APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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