Gaya APA
Gerson, Richard F.. ().
Keeping customers for life .
:
.
Gaya Chicago
Gerson, Richard F..
Keeping customers for life.
:
,
.
Text.
Gaya MLA
Gerson, Richard F..
Keeping customers for life.
:
,
.
Text.
Gaya Turabian
Gerson, Richard F..
Keeping customers for life.
:
,
.
Print.