Dyfyniad APA

(1970). International occupational safety health congress. International Labour Office.

Dyfyniad Arddull Chicago

International Occupational Safety Health Congress. Geneva: International Labour Office, 1970.

Dyfyniad MLA

International Occupational Safety Health Congress. International Labour Office, 1970.

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