Penggayaan APA
TULL, Donald S.. (1990).
Marketing research: (5th ed.).
New York:
Macmillan.
Chicago Style
TULL, Donald S..
Marketing research:.
5th ed.
New York:
Macmillan,
1990.
Buku.
MLA Style
TULL, Donald S..
Marketing research:.
5th ed.
New York:
Macmillan,
1990.
Buku.
Turabian Style
TULL, Donald S..
Marketing research:.
5th ed.
New York:
Macmillan,
1990.
Buku.