APA Style
Keeping customers for life. (1991).
New York:
Amacom.
Chicago Style
Keeping customers for life.
.
New York:
Amacom,
1991.
.
MLA Style
Keeping customers for life.
.
New York:
Amacom,
1991.
.
Turabian Style
Keeping customers for life.
New York:
Amacom,
1991.
.