APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Orton, Anthony. Learning Mathematics: Issues, Theory, and Classroom Practice. 2nd ed. London ; New York, NY, USA: Cassell, 1992.

MLA (9th ed.) Citation

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