Gaya APA
Nathalia. (2015).
Ultimate selling .
Jakarta:
Gramedia Pustaka Utama.
Gaya Chicago
Nathalia.
Ultimate selling.
Jakarta:
Gramedia Pustaka Utama,
2015.
Text.
Gaya MLA
Nathalia.
Ultimate selling.
Jakarta:
Gramedia Pustaka Utama,
2015.
Text.
Gaya Turabian
Nathalia.
Ultimate selling.
Jakarta:
Gramedia Pustaka Utama,
2015.
Print.