Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.