Severin, W. J., & Tankard, J. W. (1997). Communication theories: Origins, methods, and uses in the mass media (4th ed.). Longman.
Chicago Style aipamenaSeverin, Werner J., and James W. Tankard. Communication Theories: Origins, Methods, and Uses in the Mass Media. 4th ed. New York: Longman, 1997.
MLA aipamenaSeverin, Werner J., and James W. Tankard. Communication Theories: Origins, Methods, and Uses in the Mass Media. 4th ed. Longman, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.