APA (7th ed.) Citation

Engel, W. (1939). Sensible dieting and the Engel vital calorie diets. A. A. Knopf.

Chicago Style (17th ed.) Citation

Engel, William. Sensible Dieting and the Engel Vital Calorie Diets. New York & London: A. A. Knopf, 1939.

MLA (9th ed.) Citation

Engel, William. Sensible Dieting and the Engel Vital Calorie Diets. A. A. Knopf, 1939.

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