APA-viite (7. p.)

Copeland, R. W. (1974). How children learn mathematics: Teaching implications of Piaget's research (2d ed.). Macmillan.

Chicago-viite (17. p.)

Copeland, Richard W. How Children Learn Mathematics: Teaching Implications of Piaget's Research. 2d ed. New York: Macmillan, 1974.

MLA-viite (9. p.)

Copeland, Richard W. How Children Learn Mathematics: Teaching Implications of Piaget's Research. 2d ed. Macmillan, 1974.