Gaya APA
Baier, Martin. (1985).
Elements of direct marketing .
New York:
McGraw Hill.
Gaya Chicago
Baier, Martin.
Elements of direct marketing.
New York:
McGraw Hill,
1985.
Buku.
Gaya MLA
Baier, Martin.
Elements of direct marketing.
New York:
McGraw Hill,
1985.
Buku.
Gaya Turabian
Baier, Martin.
Elements of direct marketing.
New York:
McGraw Hill,
1985.
Buku.