I use \renewcommand{\thechapter}{\NUMBERstring{chapter} to change my CHAPTER 1, 2, ... into CHAPTER ONE, TWO, ...
Code: Select all
\RequirePackage{titlesec}
\RequirePackage{fmtcount}
% chapters
%\renewcommand{\thechapter}{\NUMBERstring{chapter}}
\titleformat{\chapter}[display]{\filcenter\bfseries}{\Large\MakeUppercase{\chaptername{} \thechapter}}{-1.7pc}{\begin{singlespace}\bfseries\LARGE\MakeUppercase}[\end{singlespace}]
\titlespacing*{\chapter}{0pt}{*-4.5}{*6}
% section e.g. 4.1
\titleformat{\section}[hang]{\bfseries\Large}{\thesection}{6pt}{}
\titlespacing*{\section}{0pt}{*3}{*-3}
% subsection e.g. 4.1.1
\titleformat{\subsection}[hang]{\bfseries\large}{\thesubsection}{6pt}{}
\titlespacing*{\subsection}{0pt}{*3}{*-3}
% subsubsection e.g. 4.1.1(a)
\renewcommand\thesubsubsection{\thesubsection(\alph{subsubsection})}
\titleformat{\subsubsection}[hang]{\bfseries}{\thesubsubsection}{6pt}{}
\titlespacing*{\subsubsection}{0pt}{*3}{*-3}[/size]
Appreciate your kindness