APA Style
Business Communications. (1984).
Indonesia:
Elex Media Komputindo.
Chicago Style
Business Communications.
1st edition.
Indonesia:
Elex Media Komputindo,
1984.
Text.
MLA Style
Business Communications.
1st edition.
Indonesia:
Elex Media Komputindo,
1984.
Text.
Turabian Style
Business Communications.
Indonesia:
Elex Media Komputindo,
1984.
Print.