Nelson, P. E. (1990). Confidence in public speaking (4th ed.). Wm.C.Brown.
Chicago Style (17. basım) AtıfNelson, Paul Edward. Confidence in Public Speaking. 4th ed. Iowa: Wm.C.Brown, 1990.
MLA (9th ed.) AtıfNelson, Paul Edward. Confidence in Public Speaking. 4th ed. Wm.C.Brown, 1990.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..