Gaya APA
Guffey, Mary Ellen. (1991).
Essentials of Business Communication (Ed. 2).
Boston:
PWS-KENT.
Gaya Chicago
Guffey, Mary Ellen.
Essentials of Business Communication.
Ed. 2
Boston:
PWS-KENT,
1991.
Text.
Gaya MLA
Guffey, Mary Ellen.
Essentials of Business Communication.
Ed. 2
Boston:
PWS-KENT,
1991.
Text.
Gaya Turabian
Guffey, Mary Ellen.
Essentials of Business Communication.
Ed. 2
Boston:
PWS-KENT,
1991.
Print.