Saxton, D. F., & Walter, J. F. (1966). Programmed instruction in arithmetic, dosages, and solutions (2nd printing.). Mosby.
Cita Chicago Style (17a ed.)Saxton, Dolores F., y John F. Walter. Programmed Instruction in Arithmetic, Dosages, and Solutions. 2nd printing. Saint Louis: Mosby, 1966.
Cita MLA (9a ed.)Saxton, Dolores F., y John F. Walter. Programmed Instruction in Arithmetic, Dosages, and Solutions. 2nd printing. Mosby, 1966.
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