Gaya APA
Websters guide to business correspondence. (1988).
SPRINGFIELD, MASS:
Merriam-Webster.
Gaya Chicago
Websters guide to business correspondence.
.
SPRINGFIELD, MASS:
Merriam-Webster,
1988.
Buku.
Gaya MLA
Websters guide to business correspondence.
.
SPRINGFIELD, MASS:
Merriam-Webster,
1988.
Buku.
Gaya Turabian
Websters guide to business correspondence.
SPRINGFIELD, MASS:
Merriam-Webster,
1988.
Buku.