APA (7th ed.) Citation

Langer, W. C., Langer, W. L., & Waite, R. G. (1973). The mind of Adolf Hitler. Secker and Warburg.

Chicago Style (17th ed.) Citation

Langer, Walter C., William L. Langer, and Robert G.L Waite. The Mind of Adolf Hitler. London: Secker and Warburg, 1973.

MLA (8th ed.) Citation

Langer, Walter C., et al. The Mind of Adolf Hitler. Secker and Warburg, 1973.