Cita APA (7th ed.)

Zimmermann, W., & Cunningham, S. (1991). Visualization in teaching and learning mathematics. The Mathematical Association of America.

Cita Chicago (17th ed.)

Zimmermann, Walter, i Steve Cunningham. Visualization in Teaching and Learning Mathematics. Washington, D.C: The Mathematical Association of America, 1991.

Cita MLA (9th ed.)

Zimmermann, Walter, i Steve Cunningham. Visualization in Teaching and Learning Mathematics. The Mathematical Association of America, 1991.