APA (7. basım) Alıntı
Guffey, M. E. (1998). Essentials of business communication (4th ed.). South-Western College Pub..
Chicago Style (17. basım) Atıf
Guffey, Mary Ellen. Essentials of Business Communication. 4th ed. Cincinnati, Ohio: South-Western College Pub., 1998.
MLA (9th ed.) Atıf
Guffey, Mary Ellen. Essentials of Business Communication. 4th ed. South-Western College Pub., 1998.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..