Παραπομπή APA

Butcher, H. (1968). Human intelligence: Its Nature and Assessment. Methun & Co.

Παραπομπή Chicago Style

Butcher, H.J. Human Intelligence: Its Nature and Assessment. London: Methun & Co, 1968.

Παραπομπή MLA

Butcher, H.J. Human Intelligence: Its Nature and Assessment. Methun & Co, 1968.