Dyfyniad APA

Professional Safety. American Society of Safety Professionals (ASSP).

Dyfyniad Arddull Chicago

Professional Safety. American Society of Safety Professionals (ASSP).

Dyfyniad MLA

Professional Safety. American Society of Safety Professionals (ASSP).

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