APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.