Dyfyniad APA

United Nations. Department of Economic and Social Affairs. (1955). Estudio economico mundial. [s.n.].

Dyfyniad Arddull Chicago

United Nations. Department of Economic and Social Affairs. Estudio Economico Mundial. New York: [s.n.], 1955.

Dyfyniad MLA

United Nations. Department of Economic and Social Affairs. Estudio Economico Mundial. [s.n.], 1955.

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