APA (7th ed.) Citation

Zangwill, O. L. (1950). An introduction to modern psychology / by O.L. Zangwill. Methuen.

Chicago Style (17th ed.) Citation

Zangwill, O. L. An Introduction to Modern Psychology / by O.L. Zangwill. Methuen, 1950.

MLA (9th ed.) Citation

Zangwill, O. L. An Introduction to Modern Psychology / by O.L. Zangwill. Methuen, 1950.

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