Dyfyniad APA

(1981). Effective communication on the job (3rd ed.). AMACOM.

Dyfyniad Arddull Chicago

Effective Communication on the Job. 3rd ed. New York: AMACOM, 1981.

Dyfyniad MLA

Effective Communication on the Job. 3rd ed. AMACOM, 1981.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.