APA (7e ed.) Bronvermelding

Copeland, R. W. (1984). How children learn mathematics: Teaching implications of Piaget's research (4th ed.). Macmillan.

Chicago (17e ed.) Bronvermelding

Copeland, Richard W. How Children Learn Mathematics: Teaching Implications of Piaget's Research. 4th ed. New York: Macmillan, 1984.

MLA (9e ed.) Bronvermelding

Copeland, Richard W. How Children Learn Mathematics: Teaching Implications of Piaget's Research. 4th ed. Macmillan, 1984.