APA Style
Gordman, R. (2007).
The Must Have Customer: 7 taktik jitu Merebut Hati pelanggan idaman anda .
Jakarta:
Gramedia Pustaka Utama.
MLA Style
Gordman, Robert.
"The Must Have Customer: 7 taktik jitu Merebut Hati pelanggan idaman anda".
Jakarta:
Gramedia Pustaka Utama,
2007.
BOOKS.