Engel, W. (1939). Sensible dieting and the Engel vital calorie diets. A. A. Knopf.
芝加哥风格引文Engel, William. Sensible Dieting and the Engel Vital Calorie Diets. New York & London: A. A. Knopf, 1939.
MLA引文Engel, William. Sensible Dieting and the Engel Vital Calorie Diets. A. A. Knopf, 1939.
警告：这些引文格式不一定是100％准确.