Cita APA (7th ed.)

Liebert, R. M., & Spiegler, M. D. (1994). Personality: Strategies and issues (7th ed.). Brooks/Cole Pub.

Cita Chicago (17th ed.)

Liebert, Robert M., i Michael D. Spiegler. Personality: Strategies and Issues. 7th ed. Pacific Grove, CA: Brooks/Cole Pub, 1994.

Cita MLA (9th ed.)

Liebert, Robert M., i Michael D. Spiegler. Personality: Strategies and Issues. 7th ed. Brooks/Cole Pub, 1994.