Gaya APA

Levy, B, S., Wegman, D, H. (2011). Occupational and Enviromental Health : Recognizing and Preventing Disease and Injury (7). : OXPORD.

Gaya MLA

Levy, Barry, S.., Wegman, David, H.. "Occupational and Enviromental Health : Recognizing and Preventing Disease and Injury". 7 : OXPORD, 2011. Text.