Dyfyniad APA

Spencer, P. L. (1952). Building mathematical concepts in the elementary school. Holt.

Dyfyniad Arddull Chicago

Spencer, Peter Lincoln. Building Mathematical Concepts in the Elementary School. New York: Holt, 1952.

Dyfyniad MLA

Spencer, Peter Lincoln. Building Mathematical Concepts in the Elementary School. Holt, 1952.

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