Cita APA (7a ed.)

Gilbert, G. T., Krusemeyer, M. I., & Larson, L. C. (1993). The Wohascum county problem book. The Mathematical Association of America.

Cita Chicago Style (17a ed.)

Gilbert, George Thomas, Mark I. Krusemeyer, y Loren C. Larson. The Wohascum County Problem Book. Washington, D.C: The Mathematical Association of America, 1993.

Cita MLA (9a ed.)

Gilbert, George Thomas, et al. The Wohascum County Problem Book. The Mathematical Association of America, 1993.