Tohutoro APA (7th ed.)
Hartley, P. (1997). Group communication. Routledge.
Tohutoru Kātū Chicago (17th ed.)
Hartley, Peter. Group Communication. London ; New York: Routledge, 1997.
Tohutoro MLA (9th ed.)
Hartley, Peter. Group Communication. Routledge, 1997.
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