APA (7th ed.) Citation

Whimbey, A., & Lochhead, J. (1986). Problem solving and comprehension (4th ed.). L. Erlbaum Associates.

Chicago Style (17th ed.) Citation

Whimbey, Arthur, and Jack Lochhead. Problem Solving and Comprehension. 4th ed. Hillsdale, N.J.: L. Erlbaum Associates, 1986.

MLA (9th ed.) Citation

Whimbey, Arthur, and Jack Lochhead. Problem Solving and Comprehension. 4th ed. L. Erlbaum Associates, 1986.