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