APA (7th ed.) Citation

Schneider, H., & Schneider, N. (1949). How your body works. W. R. Scott.

Chicago Style (17th ed.) Citation

Schneider, Herman, and Nina Schneider. How Your Body Works. New York: W. R. Scott, 1949.

MLA (9th ed.) Citation

Schneider, Herman, and Nina Schneider. How Your Body Works. W. R. Scott, 1949.