Put Source under the table or figure[ usepackage[cappositon=top]{floatrow}

\documentclass{article}

\usepackage[capposition=top]{floatrow}

\begin{document}

\begin{figure}
% \centering% default with `floatrow`
\rule{1cm}{1cm}% placeholder for `\includegraphics`
\caption{A figure}
\floatfoot{A note}
\end{figure}

\end{document}

Tukar chapter kepada Bab

\renewcommand{\chaptername}{Bab}

link untuk package affiliation 

affiliation

\usepackage{authblk}

\affil{Deparment of Economics and Agribusiness, Universiti Utara Malaysia.}                

double summation

\usepackage{amsmath}

\begin{equation}

log L\sum\limits_{i=j}^{N}\sum\limits_{j=1}^{J}y_{ij}\begin{bmatrix}

\dfrac{exp(V_{ij}}{\sum\limits_{j=1}^{J}exp(V_{ij}}

\end{bmatrix}

\end{equation}

doublespacing

\usepackage{setspace}

tulis dimana kita nak mula doublespacing arahan berikut
\doublespacing

citation rearrange name

dalam jabref, masukkan {} pada setiap nama
{Adamowicz W.} and {Louviere J.} and {Williams M.}

hasilnya


Adamowicz W., Louviere J., and Williams M. (1994). Combining revealed and
stated preference methods for valuing environmental amenities. Journal of
environmental economics and management, 26:271{292.