Gaya APA
Hawkins, Del L., TULL,Donald S. (1987).
Marketing Reasearch (4th.ed).
New York:
MacMillan Publishers.
Gaya Chicago
Hawkins, Del L., TULL,Donald S.
Marketing Reasearch.
4th.ed
New York:
MacMillan Publishers,
1987.
Teks.
Gaya MLA
Hawkins, Del L., TULL,Donald S.
Marketing Reasearch.
4th.ed
New York:
MacMillan Publishers,
1987.
Teks.
Gaya Turabian
Hawkins, Del L., TULL,Donald S.
Marketing Reasearch.
4th.ed
New York:
MacMillan Publishers,
1987.
Teks.