Gaya APA
CHURCHILL, G, A., NEILZEN, A, C.
(2001).
Basic marketing research
(
5nd ed.)
.
Texas:
Dryden.
Gaya MLA
CHURCHILL, Gilbert, A., NEILZEN, Arthur, C..
"Basic marketing research".
5nd ed.
Texas:
Dryden,
2001.
Buku.