Dyfyniad APA

Gould, J. (1965). Penguin survey of the social sciences1965 (Pelican psychology series.). Penguin Books.

Dyfyniad Arddull Chicago

Gould, Julius. Penguin Survey of the Social Sciences1965. Pelican psychology series. Australia: Penguin Books, 1965.

Dyfyniad MLA

Gould, Julius. Penguin Survey of the Social Sciences1965. Pelican psychology series. Penguin Books, 1965.

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