Cita APA (7th ed.)

Orton, A. (1992). Learning mathematics: Issues, theory and classroom practice (2nd ed.). Cassell.

Cita Chicago (17th ed.)

Orton, Anthony. Learning Mathematics: Issues, Theory and Classroom Practice. 2nd ed. London: Cassell, 1992.

Cita MLA (9th ed.)

Orton, Anthony. Learning Mathematics: Issues, Theory and Classroom Practice. 2nd ed. Cassell, 1992.