Dyfyniad APA

(1977). Yearbook of Industrial Statistics 1975. United Nations.

Dyfyniad Arddull Chicago

Yearbook of Industrial Statistics 1975. New York: United Nations, 1977.

Dyfyniad MLA

Yearbook of Industrial Statistics 1975. United Nations, 1977.

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