Gaya APA
dkk, S, M, L, P. (2007).
Research Methods For Business Students Ed.4 .
Inggris:
Pearson Education Limited.
Gaya MLA
dkk, Saunders, Mark;, Lewis, Philip,.
"Research Methods For Business Students Ed.4".
Inggris:
Pearson Education Limited,
2007.
Text.