APA (7th ed.) Citation

Brown, S. I., & Walter, M. I. (1983). The Art of problem posing (2. print.). Erlbaum.

Chicago Style (17th ed.) Citation

Brown, Stephen I., and Marion I. Walter. The Art of Problem Posing. 2. print. Hillsdale, NJ: Erlbaum, 1983.

MLA (9th ed.) Citation

Brown, Stephen I., and Marion I. Walter. The Art of Problem Posing. 2. print. Erlbaum, 1983.