Kutz, R. E. (1991). Teaching elementary mathematics: An active approach. Allyn and Bacon.
Cita Chicago (17th ed.)Kutz, Ronald E. Teaching Elementary Mathematics: An Active Approach. Boston: Allyn and Bacon, 1991.
Cita MLA (9th ed.)Kutz, Ronald E. Teaching Elementary Mathematics: An Active Approach. Allyn and Bacon, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.