Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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