Gaya APA
Cresci, Martha W.. (1976).
Complete Book of Model Business Letters .
New York:
Parker Publishing Company.
Gaya Chicago
Cresci, Martha W..
Complete Book of Model Business Letters.
New York:
Parker Publishing Company,
1976.
Buku Teks.
Gaya MLA
Cresci, Martha W..
Complete Book of Model Business Letters.
New York:
Parker Publishing Company,
1976.
Buku Teks.
Gaya Turabian
Cresci, Martha W..
Complete Book of Model Business Letters.
New York:
Parker Publishing Company,
1976.
Buku Teks.