APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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