APA Style
Model Business Letter. (1900).
Indonesia:
Elex Media Komputindo.
Chicago Style
Model Business Letter.
1st edition.
Indonesia:
Elex Media Komputindo,
1900.
Text.
MLA Style
Model Business Letter.
1st edition.
Indonesia:
Elex Media Komputindo,
1900.
Text.
Turabian Style
Model Business Letter.
Indonesia:
Elex Media Komputindo,
1900.
Print.