Gaya APA
ZIKMUND, W, G., BABIN, B, J. (2010).
Exploring marketing research (10th ed.).
Australia:
South-western Cengage Learning.
Gaya MLA
ZIKMUND, William, G.., BABIN, Barry, J..
"Exploring marketing research".
10th ed.
Australia:
South-western Cengage Learning,
2010.
Buku.