%% 
%%  A DANTE-Edition example
%% 
%%  Example 02-21-2 on page 95.
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1,2
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{183.78818pt}
\usepackage[utf8]{inputenc}% adapt maybe
\usepackage[paper=70mm:90mm,pagesize]{typearea}
\areaset{60mm}{58mm}
\usepackage[english]{babel}
\AtBeginDocument{\setlength\parindent{0pt}}
\usepackage{fancyhdr}
\lhead{\small \texttt{threeparttablex} demo}
\pagestyle{fancy}
\setcounter{page}{1}
\renewcommand\thepage{page \arabic{page}}

\usepackage{longtable} \usepackage[referable]{threeparttablex}

\begin{document}
\begin{ThreePartTable}
\begin{TableNotes}
\item[a]\label{tn:a} A remark to the table.
\item[b]\label{tn:b} This table is only a demo.
\end{TableNotes}
\begin{longtable}{@{}l c r p{1.5cm}@{}}
L & C & R & box\\\hline
\endfirsthead
\multicolumn{4}{@{}l}{\small\ldots\emph{continued}}\\\hline
L & C & R & box\\\hline
\endhead
\hline
\multicolumn{4}{r@{}}{\small\emph{continued on next page} \ldots}\\
\endfoot
\hline
\insertTableNotes
\endlastfoot
l & c & r & 1st row\\ l & c & r & 2nd row\\ l & c & r & 3rd row\\
l & c\tnotex{tn:a} & r & 4th row\\ l & c & r\tnotex{tn:b} & 5th row\\
l & c & r & 6th row\\ l & c & r & 7th row\\ l & c & r & 8th row\\
l & c & r & 9th row\\ l & c & r &10th row\\ l & c & r &11th row\\
l & c & r &12th row
\end{longtable}
\end{ThreePartTable}

The remarks~\ref{tn:a} and~\ref{tn:b} in the table\ldots.
\end{document}