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Dyfyniad Arddull Chicago-. Who's Who in the West 1984-1985.-- Ed.19. Chicago: Marquis Who's Who, 1985.
Dyfyniad MLA-. Who's Who in the West 1984-1985.-- Ed.19. Marquis Who's Who, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.