Zimmermann, W., & Cunningham, S. (1991). Visualization in teaching and learning mathematics. The Mathematical Association of America.
Citazione stile Chigago Style (17a edizione)Zimmermann, Walter, e Steve Cunningham. Visualization in Teaching and Learning Mathematics. Washington, D.C: The Mathematical Association of America, 1991.
Citatione MLA (9a ed.)Zimmermann, Walter, e Steve Cunningham. Visualization in Teaching and Learning Mathematics. The Mathematical Association of America, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.