APA Edition Citation

Spencer, P. L., & Brydegaard, M. (1961). Building mathematical concepts in the elementary school.

Chicago Edition Citation

Spencer, Peter Lineoln, and Marguerite Brydegaard. Building Mathematical Concepts in the Elementary School. 1961.

MLA Edition Citation

Spencer, Peter Lineoln, and Marguerite Brydegaard. Building Mathematical Concepts in the Elementary School. 1961.

Warning: These citations may not always be 100% accurate.