APA (7th ed.) Citation

Brett, G. S. (1921). A history of psychology / by George Sidney Brett. Allen and Unwin.

Chicago Style (17th ed.) Citation

Brett, George Sidney. A History of Psychology / by George Sidney Brett. London: Allen and Unwin, 1921.

MLA (9th ed.) Citation

Brett, George Sidney. A History of Psychology / by George Sidney Brett. Allen and Unwin, 1921.

Warning: These citations may not always be 100% accurate.