Dyfyniad APA

(1965). Dissertation Abstracts: Abstracts of Dissertations and Monographs in Microform. University Microfilms.

Dyfyniad Arddull Chicago

Dissertation Abstracts: Abstracts of Dissertations and Monographs in Microform. Michigan: University Microfilms, 1965.

Dyfyniad MLA

Dissertation Abstracts: Abstracts of Dissertations and Monographs in Microform. University Microfilms, 1965.

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