APA (7th ed.) Citation

Haslett, A. W. (1935). Unsolved problems of science. Macmillan.

Chicago Style (17th ed.) Citation

Haslett, Arthur Woods. Unsolved Problems of Science. New York: Macmillan, 1935.

MLA (9th ed.) Citation

Haslett, Arthur Woods. Unsolved Problems of Science. Macmillan, 1935.

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