APA (7th ed.) Citation

Engstrand, S. D. (1937). The invaders. A. A. Knopf.

Chicago Style (17th ed.) Citation

Engstrand, Stuart David. The Invaders. New York, London: A. A. Knopf, 1937.

MLA (9th ed.) Citation

Engstrand, Stuart David. The Invaders. A. A. Knopf, 1937.

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