Dyfyniad APA

(1967). The Foudation Directory (3rd ed.). Russell Sage Foundation.

Dyfyniad Arddull Chicago

The Foudation Directory. 3rd ed. New York: Russell Sage Foundation, 1967.

Dyfyniad MLA

The Foudation Directory. 3rd ed. Russell Sage Foundation, 1967.

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