Nelson, P. E. (1990). Confidence in public speaking (4th ed.). Wm.C.Brown.
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Chicago-čujuhus (17. p.)
Nelson, Paul Edward. Confidence in Public Speaking. 4th ed. Iowa: Wm.C.Brown, 1990.
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MLA-čujuhus (9. p.)
Nelson, Paul Edward. Confidence in Public Speaking. 4th ed. Wm.C.Brown, 1990.
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