Kutz, R. E. (1991). Teaching elementary mathematics: An active approach. Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Kutz, Ronald E. Teaching Elementary Mathematics: An Active Approach. Boston: Allyn and Bacon, 1991.
Lua MLA (9ú heag.)Kutz, Ronald E. Teaching Elementary Mathematics: An Active Approach. Allyn and Bacon, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.