APA Style
Multipurpose Letters. (1999).
Indonesia:
Elex Media Komputindo.
Chicago Style
Multipurpose Letters.
1st edition.
Indonesia:
Elex Media Komputindo,
1999.
Text.
MLA Style
Multipurpose Letters.
1st edition.
Indonesia:
Elex Media Komputindo,
1999.
Text.
Turabian Style
Multipurpose Letters.
Indonesia:
Elex Media Komputindo,
1999.
Print.