Dyfyniad APA

Friend, M. A., & Kohn, J. P. (2010). Fundamentals of occupational safety and health (5th ed.). Government Institutes.

Dyfyniad Arddull Chicago

Friend, Mark A., and James P. Kohn. Fundamentals of Occupational Safety and Health. 5th ed. Lanham: Government Institutes, 2010.

Dyfyniad MLA

Friend, Mark A., and James P. Kohn. Fundamentals of Occupational Safety and Health. 5th ed. Government Institutes, 2010.

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