APA (7th ed.) Citation

Singer, H. W. (1940). Unemployment and the unemployed: By H. W. Singer. Chemical publishing co., inc..

Chicago Style (17th ed.) Citation

Singer, Hans Wolfgang. Unemployment and the Unemployed: By H. W. Singer. New York, N. Y.: Chemical publishing co., inc., 1940.

MLA (9th ed.) Citation

Singer, Hans Wolfgang. Unemployment and the Unemployed: By H. W. Singer. Chemical publishing co., inc., 1940.