Penggayaan APA
CHRISTENSEN, N. C.. (1972).
The art of persuasion in selling .
New York:
Parker Publishing company.
Chicago Style
CHRISTENSEN, N. C..
The art of persuasion in selling.
New York:
Parker Publishing company,
1972.
Buku.
MLA Style
CHRISTENSEN, N. C..
The art of persuasion in selling.
New York:
Parker Publishing company,
1972.
Buku.
Turabian Style
CHRISTENSEN, N. C..
The art of persuasion in selling.
New York:
Parker Publishing company,
1972.
Buku.