O'Connell, S. (2000). Introduction to problem solving: Strategies for the elementary math classroom. Heinemann.
Citazione stile Chigago Style (17a edizione)O'Connell, Susan. Introduction to Problem Solving: Strategies for the Elementary Math Classroom. Portsmouth, N.H: Heinemann, 2000.
Citatione MLA (9a ed.)O'Connell, Susan. Introduction to Problem Solving: Strategies for the Elementary Math Classroom. Heinemann, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.