Allego l’esempio richiesto
`\documentclass[11pt,a4paper,titlepage,italian]{book}
\usepackage[ansinew]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[italian]{babel}
\usepackage{pxfonts}
\usepackage{index}
\usepackage{array}
\usepackage{microtype}
\usepackage{booktabs}
\usepackage{afterpage}
\usepackage{titletoc}
\usepackage{titlesec}
\usepackage[titles]{tocloft}
\usepackage[babel=once]{csquotes}
\usepackage[hang]{footmisc}
\usepackage{footnote}
\usepackage[perpage]{manyfoot}
\usepackage{fancyhdr}
\usepackage[paperheight=23.8cm,paperwidth=15.5cm]{geometry}
\geometry{textheight=174mm,textwidth=115mm,headheight=14pt}
\newcommand{\cambiaFont}[2]{{\fontencoding{T1}\fontfamily{#1}%
\selectfont#2}}
\pagestyle{fancy}
\renewcommand{\sectionmark}[1]{}
\renewcommand{\chaptermark}[1]{\markboth{\chaptername\ \thechapter}{#1}}
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\fancyhead[LE,RO]{\thepage}
\fancyhead[CO]{\cambiaFont{pag}{\tiny\MakeUppercase\rightmark}}
\fancyhead[CE]{\cambiaFont{pag}{\tiny\MakeUppercase\leftmark}}
\renewcommand{\headrulewidth}{0.5pt}
\renewcommand{\footrulewidth}{0pt}
\addtolength{\headheight}{0.5pt}%
\fancypagestyle{plain}{%
\fancyhead{}%
\renewcommand{\headrulewidth}{0pt}
}
\makesavenoteenv{tabular}
\renewcommand{\footnoterule}{}
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\footnotemargin=1em
\renewcommand{\thepart}{\arabic{part}}
\renewcommand{\thechapter}{\Roman{chapter}}
\renewcommand{\thesection}{\arabic{section}}
\titleformat{\section}{\slshape}{\thesection.}{.5em}{}
\titleformat{\chapter}[display]
{\filcenter}
{\normalfont\large
\textsc{\chaptertitlename~\thechapter}}
{24pt}
{\normalfont\Large\MakeUppercase}
\titleformat{\part}[display]
{\filcenter}
{\normalfont\LARGE
\textsc{\partname~\thepart}}
{24pt}
{\normalfont\Large\MakeUppercase}
\titlespacing*{\part}
{0pt}{15mm}{0pt}
\renewcommand{\cftdot}{}
\renewcommand{\cfttoctitlefont}{\hfill\Large\scshape}
\renewcommand{\cftaftertoctitle}{\hfill}
\renewcommand{\cftloftitlefont}{\hfill\Large\scshape}
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\renewcommand{\cftlottitlefont}{\hfill\Large\scshape}
\renewcommand{\cftafterlottitle}{\hfill}
\renewcommand{\cftpartfont}{\normalfont\bfseries}
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\renewcommand{\cftsecfont}{\slshape}
\renewcommand{\cftchapaftersnum}{.}
\renewcommand{\cftsecaftersnum}{.}
\cftsetindents{sec}{2.15em}{1.7em}
\AtBeginDocument{\addtolength{\cftchapnumwidth}{.8em}}
\AtBeginDocument{\addtolength{\cfttabnumwidth}{.7em}}
\renewcommand{\cftchappagefont}{\normalfont}
\renewcommand{\cftpartpagefont}{\normalfont}
\frenchspacing
\begin{document}
\tableofcontents
%\addtocontents{toc}{\cftpagenumbersoff{chapter}}
\part{Parte prima}
\chapter{Capitolo uno}
\section{Sezione uno}
\section{Sezione due}
\section{Sezione tre}
\part{Parte seconda}
\chapter{Capitolo due}
\section{Sezione uno}
\section{Sezione due}
\section{Sezione tre}
\chapter{Capitolo tre}
\section{Sezione uno}
\section{Sezione due}
\section{Sezione tre}
\chapter{Capitolo quattro}
\section{Sezione uno}
\section{Sezione due}
\section{Sezione tre}
\part{Parte terza}
\chapter{Capitolo cinque}
\section{Sezione uno}
\section{Sezione due}
\section{Sezione tre}
\chapter{Capitolo sei}
\section{Sezione uno}
\section{Sezione due}
\section{Sezione tre}
\chapter{Capitolo sette}
\section{Sezione uno}
\section{Sezione due}
\section{Sezione tre}
\part{Appendici}
\appendix
\chapter{Appendice A}
\chapter{Appendice B}
\end{document}%`