Cita APA (7th ed.)

Spurgin, S. D. W. (1989). The Power to Persuade (2nd ed.). Prentice-Hall.

Cita Chicago (17th ed.)

Spurgin, Sally De Witt. The Power to Persuade. 2nd ed. Englewood Cliffs, N.J.: Prentice-Hall, 1989.

Cita MLA (9th ed.)

Spurgin, Sally De Witt. The Power to Persuade. 2nd ed. Prentice-Hall, 1989.