Dyfyniad APA

(1981). International Yearbook and Statesman's Who's Who. Kelly's Directories.

Dyfyniad Arddull Chicago

International Yearbook and Statesman's Who's Who. Sussex: Kelly's Directories, 1981.

Dyfyniad MLA

International Yearbook and Statesman's Who's Who. Kelly's Directories, 1981.

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