Cita APA (7th ed.)
Hart, R. P., Brooks, W. D., & Friedrich, G. W. (1975). Public communication. Harper and Row.
Cita Chicago (17th ed.)
Hart, Roderick P., William D. Brooks, i Gustav W. Friedrich. Public Communication. New York: Harper and Row, 1975.
Cita MLA (9th ed.)
Hart, Roderick P., et al. Public Communication. Harper and Row, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.