Gaya APA
Gartside, Leonard. (1981).
Model Business Letters (3).
Jakarta:
Binarupa Aksara.
Gaya Chicago
Gartside, Leonard.
Model Business Letters.
3
Jakarta:
Binarupa Aksara,
1981.
Text Book.
Gaya MLA
Gartside, Leonard.
Model Business Letters.
3
Jakarta:
Binarupa Aksara,
1981.
Text Book.
Gaya Turabian
Gartside, Leonard.
Model Business Letters.
3
Jakarta:
Binarupa Aksara,
1981.
Text Book.