APA Style
Ultimate Book of Business Letters : customize your. (2007).
Indonesia:
Elex Media Komputindo.
Chicago Style
Ultimate Book of Business Letters : customize your.
1st edition.
Indonesia:
Elex Media Komputindo,
2007.
Text.
MLA Style
Ultimate Book of Business Letters : customize your.
1st edition.
Indonesia:
Elex Media Komputindo,
2007.
Text.
Turabian Style
Ultimate Book of Business Letters : customize your.
Indonesia:
Elex Media Komputindo,
2007.
Print.