Dyfyniad APA

British Psychological Society & Vernon, P. E. (1957). Secondary school selection: A British Psychological Society inquiry. Methuen.

Dyfyniad Arddull Chicago

British Psychological Society and Philip E. Vernon. Secondary School Selection: A British Psychological Society Inquiry. London: Methuen, 1957.

Dyfyniad MLA

British Psychological Society and Philip E. Vernon. Secondary School Selection: A British Psychological Society Inquiry. Methuen, 1957.

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