Gaya APA

Levy, B, S., Wegman, D, H. (2000). Occupational Health : Recognizing and Preventing Work-Related Disease and Injury (4th Ed.). Philadelphia: Lippincott.

Gaya MLA

Levy, Barry, S.., Wegman, David, H.. "Occupational Health : Recognizing and Preventing Work-Related Disease and Injury". 4th Ed. Philadelphia: Lippincott, 2000. Text.