Cita APA (7th ed.)

Spinard, L., & Spinard, T. (1997). Speaker's lifetime library. Prentice-Hall.

Cita Chicago (17th ed.)

Spinard, Leonard, i Thelma Spinard. Speaker's Lifetime Library. Englewood Cliffs, N.J: Prentice-Hall, 1997.

Cita MLA (9th ed.)

Spinard, Leonard, i Thelma Spinard. Speaker's Lifetime Library. Prentice-Hall, 1997.