Citazione Stile APA (7a Edizione)

Liebert, R. M., & Spiegler, M. D. (1990). Personality: Strategies and issues (6th ed.). Brooks/Cole.

Citazione stile Chigago Style (17a edizione)

Liebert, Robert M., e Michael D. Spiegler. Personality: Strategies and Issues. 6th ed. Pacific Grove, Calif: Brooks/Cole, 1990.

Citatione MLA (9a ed.)

Liebert, Robert M., e Michael D. Spiegler. Personality: Strategies and Issues. 6th ed. Brooks/Cole, 1990.