APA Style
Shiffman, Sthepan. (1992).
Telemarketing .
America:
Bob Adams, Inc.
Chicago Style
Shiffman, Sthepan.
Telemarketing.
America:
Bob Adams, Inc,
1992.
Buku Teks.
MLA Style
Shiffman, Sthepan.
Telemarketing.
America:
Bob Adams, Inc,
1992.
Buku Teks.
Turabian Style
Shiffman, Sthepan.
Telemarketing.
America:
Bob Adams, Inc,
1992.
Buku Teks.