APA (7th ed.) Citation

Emmet, E. R. (1977). A diversity of puzzles: Not only for experts. Barnes & Noble Books.

Chicago Style (17th ed.) Citation

Emmet, E. R. A Diversity of Puzzles: Not Only for Experts. New York: Barnes & Noble Books, 1977.

MLA (9th ed.) Citation

Emmet, E. R. A Diversity of Puzzles: Not Only for Experts. Barnes & Noble Books, 1977.