Gaya APA
Secretarial English. (1964).
USA:
Regents Publishing Company, Inc.
Gaya Chicago
Secretarial English.
.
USA:
Regents Publishing Company, Inc,
1964.
Text.
Gaya MLA
Secretarial English.
.
USA:
Regents Publishing Company, Inc,
1964.
Text.
Gaya Turabian
Secretarial English.
USA:
Regents Publishing Company, Inc,
1964.
Print.