Cita APA

Howard, C. F., & Dumas, E. (1963). Basic procedures in teaching arithmetic.

Chicago Edition Citation

Howard, Charles F., i Enoch Dumas. Basic Procedures in Teaching Arithmetic. 1963.

Cita MLA

Howard, Charles F., i Enoch Dumas. Basic Procedures in Teaching Arithmetic. 1963.

Atenció: Aquestes cites poden no estar 100% correctes.