Citazione Stile APA (7a Edizione)

HAMMER, W. (1989). Occupational safety management and engineering (Ed.4.). Prentice Hall.

Citazione stile Chigago Style (17a edizione)

HAMMER, Willie. Occupational Safety Management and Engineering. Ed.4. New Jersey: Prentice Hall, 1989.

Citatione MLA (9a ed.)

HAMMER, Willie. Occupational Safety Management and Engineering. Ed.4. Prentice Hall, 1989.