Ehninger, D. (1978). Principles and types of speech communication (8th ed.). Schott foresman.
Chicago-čujuhus (17. p.)Ehninger, Douglas. Principles and Types of Speech Communication. 8th ed. London: Schott foresman, 1978.
MLA-čujuhus (9. p.)Ehninger, Douglas. Principles and Types of Speech Communication. 8th ed. Schott foresman, 1978.
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