Prochnow, H. V. (1949). The toastmaster's handbook. Prentice-Hall.
Cita Chicago (17th ed.)Prochnow, Herbert Vicrtor. The Toastmaster's Handbook. New York: Prentice-Hall, 1949.
Cita MLA (9th ed.)Prochnow, Herbert Vicrtor. The Toastmaster's Handbook. Prentice-Hall, 1949.
Atenció: Aquestes cites poden no estar 100% correctes.