APA Style

Lazo, J, S. et al (2006). Review for USMLE : United States medical licensing examination, step 1 (7th). Philadelphia, PA: Lippincott Williams & Wilkins.

MLA Style

Lazo, John, S.. et al. "Review for USMLE : United States medical licensing examination, step 1". 7th Philadelphia, PA: Lippincott Williams & Wilkins, 2006. Text.