Tohutoro APA (7th ed.)
Speer, D. C. (1972). Nonverbal communication. Sage publications.
Tohutoru Kātū Chicago (17th ed.)
Speer, David C. Nonverbal Communication. London: Sage publications, 1972.
Tohutoro MLA (9th ed.)
Speer, David C. Nonverbal Communication. Sage publications, 1972.
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