APA (7th ed.) Citation

Whimbey, A., & Lochhead, J. (1991). Problem solving and comprehension (5th ed.). Lawrence Erlbaum.

Chicago Style (17th ed.) Citation

Whimbey, Arthur, and Jack Lochhead. Problem Solving and Comprehension. 5th ed. Hillsdale, New Jersey [etc.]: Lawrence Erlbaum, 1991.

MLA (9th ed.) Citation

Whimbey, Arthur, and Jack Lochhead. Problem Solving and Comprehension. 5th ed. Lawrence Erlbaum, 1991.