Cita APA (7th ed.)

Thomas, D. A. (1981). Successful business speaking: A pracical guide for the student and professional. National Textbook.

Cita Chicago (17th ed.)

Thomas, David A. Successful Business Speaking: A Pracical Guide for the Student and Professional. Skokie, Ill: National Textbook, 1981.

Cita MLA (9th ed.)

Thomas, David A. Successful Business Speaking: A Pracical Guide for the Student and Professional. National Textbook, 1981.