Gaya APA

Hammer, W. (1980). Product safety management and engineering (Fotocopy) (1980). : Englewoods Cliffs : Prentice Hall, Inc,..

Gaya MLA

Hammer, Willie. "Product safety management and engineering (Fotocopy)". 1980 : Englewoods Cliffs : Prentice Hall, Inc,., 1980. Text.