DeVito, J. A. (1993). Messages: Building interpersonal communication skills (2nd.ed.). Harper Collins.
Lua i Stíl Chicago (17ú heag.)DeVito, Joseph A. Messages: Building Interpersonal Communication Skills. 2nd.ed. New York: Harper Collins, 1993.
Lua MLA (9ú heag.)DeVito, Joseph A. Messages: Building Interpersonal Communication Skills. 2nd.ed. Harper Collins, 1993.
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