Savage, T. V., & Armstrong, D. G. (1992). Effective teaching in elementary social studies (2nd ed.). Macmillan ; Maxwell Macmillan Canada ; Maxwell Macmillan International.

Savage, Tom V., and David G. Armstrong. Effective Teaching in Elementary Social Studies. 2nd ed. New York : Toronto : New York: Macmillan ; Maxwell Macmillan Canada ; Maxwell Macmillan International, 1992.

Savage, Tom V., and David G. Armstrong. Effective Teaching in Elementary Social Studies. 2nd ed. Macmillan ; Maxwell Macmillan Canada ; Maxwell Macmillan International, 1992.