Dyfyniad APA

National Society for the Study. (1972). Seventy first year book. NSSE.

Dyfyniad Arddull Chicago

National Society for the Study. Seventy First Year Book. Illinois: NSSE, 1972.

Dyfyniad MLA

National Society for the Study. Seventy First Year Book. NSSE, 1972.

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