APA (7 वां संस्करण) प्रशस्ति पत्र

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

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

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

एमएलए (9वां संस्करण) प्रशस्ति पत्र

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

चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.