Whimbey, A., & Lochhead, J. (1991). Problem solving and comprehension (5th ed.). Lawrence Erlbaum.
Chicago Style (17th ed.) CitationWhimbey, Arthur, and Jack Lochhead. Problem Solving and Comprehension. 5th ed. Hillsdale, New Jersey [etc.]: Lawrence Erlbaum, 1991.
MLA (9th ed.) CitationWhimbey, Arthur, and Jack Lochhead. Problem Solving and Comprehension. 5th ed. Lawrence Erlbaum, 1991.
Warning: These citations may not always be 100% accurate.