Gaya APA

WADDEN, R, A., SCHEFF, P, A. (1987). ENGINEERING DESIGN FOR THE CONTROL OF WORKPLACE HAZARDS . New York: MC GRAW HILL.

Gaya MLA

WADDEN, RICHARD, A.., SCHEFF, PETER, A.. "ENGINEERING DESIGN FOR THE CONTROL OF WORKPLACE HAZARDS". New York: MC GRAW HILL, 1987. Text.