Dyfyniad APA

Proctor, N. H., Hughes, J. P., & Fischman, M. L. (1989). Chemical hazards of the work place (2nd ed.). Van Nostrand Reinhold.

Dyfyniad Arddull Chicago

Proctor, Nick H., James P. Hughes, and Michael L. Fischman. Chemical Hazards of the Work Place. 2nd ed. N.Y: Van Nostrand Reinhold, 1989.

Dyfyniad MLA

Proctor, Nick H., et al. Chemical Hazards of the Work Place. 2nd ed. Van Nostrand Reinhold, 1989.

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