APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.