Schwieger, R. D., & Ruben D. Schwieger. (1999). Teaching elementary school mathematics: A problem-solving approach. Belmont, CA: Wadsworth Pub.
Citación estilo ChicagoSchwieger, Ruben D., y Ruben D. Schwieger. Teaching Elementary School Mathematics: A Problem-solving Approach. Belmont, CA: Wadsworth Pub, 1999.
Cita MLASchwieger, Ruben D., y Ruben D. Schwieger. Teaching Elementary School Mathematics: A Problem-solving Approach. Belmont, CA: Wadsworth Pub, 1999.
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