Gaya APA
Redymade business letters. (1991).
Jakarta:
Binarupa Aksara.
Gaya Chicago
Redymade business letters.
.
Jakarta:
Binarupa Aksara,
1991.
Text.
Gaya MLA
Redymade business letters.
.
Jakarta:
Binarupa Aksara,
1991.
Text.
Gaya Turabian
Redymade business letters.
Jakarta:
Binarupa Aksara,
1991.
Print.