Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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