Dyfyniad APA

(1957). Filed of Education. Ministry of education.

Dyfyniad Arddull Chicago

Filed of Education. Delhi: Ministry of education, 1957.

Dyfyniad MLA

Filed of Education. Ministry of education, 1957.

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