Cita APA

Hammer, W. (1981). Occupational safety management and engineering ( Photostat copy) (2.).

Chicago Edition Citation

Hammer, Willie. Occupational Safety Management and Engineering ( Photostat Copy). 2. New Jersey, Prentice Hall International, 1981.

Cita MLA

Hammer, Willie. Occupational Safety Management and Engineering ( Photostat Copy). 2. 1981.