Gaya APA

Spellman, F, R. (2006). Industrial hygiene simplified : a guide to anticipation, recognition, evaluation, and control of workplace hazards (Ed. 1). United States of America: The Scarecrow Press.

Gaya MLA

Spellman, Frank, R.. "Industrial hygiene simplified : a guide to anticipation, recognition, evaluation, and control of workplace hazards". Ed. 1 United States of America: The Scarecrow Press, 2006. Text.