Cita APA (7th ed.)

Whimbey, A., & Lochhead, J. (1993). Comprender y resolver problemas. Visor.

Cita Chicago (17th ed.)

Whimbey, Arthur, i Jack Lochhead. Comprender Y Resolver Problemas. Madrid: Visor, 1993.

Cita MLA (9th ed.)

Whimbey, Arthur, i Jack Lochhead. Comprender Y Resolver Problemas. Visor, 1993.