Dyfyniad APA

Sperling, A. P. (1982). Psychology made simple. Heinemann Proffessional Publishing.

Dyfyniad Arddull Chicago

Sperling, Abraham P. Psychology Made Simple. Oxford: Heinemann Proffessional Publishing, 1982.

Dyfyniad MLA

Sperling, Abraham P. Psychology Made Simple. Heinemann Proffessional Publishing, 1982.

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