Dyfyniad APA

Gale Research Company. (1977). Abbreviations dictionary (5th ed.). .Gale Research Co.

Dyfyniad Arddull Chicago

Gale Research Company. Abbreviations Dictionary. 5th ed. Detroit, Mich: .Gale Research Co, 1977.

Dyfyniad MLA

Gale Research Company. Abbreviations Dictionary. 5th ed. .Gale Research Co, 1977.

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