Ehninger, D., Gronbeck, B. E., & Monroe, A. H. (1979). Principles of speech communication (8th.). Scott, Foresman and co..
Lua i Stíl Chicago (17ú heag.)Ehninger, Douglas, Bruce E. Gronbeck, agus Alan Houston Monroe. Principles of Speech Communication. 8th. Illinois: Scott, Foresman and co., 1979.
Lua MLA (9ú heag.)Ehninger, Douglas, et al. Principles of Speech Communication. 8th. Scott, Foresman and co., 1979.
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