Cita APA (7th ed.)

Nelson, P. E. (1990). Confidence in public speaking (4th ed.). Wm.C.Brown.

Cita Chicago (17th ed.)

Nelson, Paul Edward. Confidence in Public Speaking. 4th ed. Iowa: Wm.C.Brown, 1990.

Cita MLA (9th ed.)

Nelson, Paul Edward. Confidence in Public Speaking. 4th ed. Wm.C.Brown, 1990.