APA aipamena

Liebert, R. M., Liebert, L. L., Liebert, R. M., & Spiegler, M. D. P. (1998). Testing your understanding practice tests for Liebert and Spiegler's personality strategies and issues (Eigth Edition.). Brooks/Cole.

Chicago Style aipamena

Liebert, Robert M., Lynn Langenbach Liebert, Robert M. Liebert, and Michael D. Personality Spiegler. Testing Your Understanding Practice Tests for Liebert and Spiegler's Personality Strategies and Issues. Eigth Edition. Pacific Grove, Ca: Brooks/Cole, 1998.

MLA aipamena

Liebert, Robert M., et al. Testing Your Understanding Practice Tests for Liebert and Spiegler's Personality Strategies and Issues. Eigth Edition. Brooks/Cole, 1998.