APA (7th ed.) Citation

Emmet, E. R. (1970). Brain puzzler's delight. Emerson Books.

Chicago Style (17th ed.) Citation

Emmet, E. R. Brain Puzzler's Delight. New York: Emerson Books, 1970.

MLA (9th ed.) Citation

Emmet, E. R. Brain Puzzler's Delight. Emerson Books, 1970.