APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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