APA (7th ed.) Citation

McDougall, W. (1911). An introduction to social psychology (4. ed.). Methuen.

Chicago Style (17th ed.) Citation

McDougall, William. An Introduction to Social Psychology. 4. ed. London: Methuen, 1911.

MLA (9th ed.) Citation

McDougall, William. An Introduction to Social Psychology. 4. ed. Methuen, 1911.