Savage, T. V., & Armstrong, D. G. (1987). Effective teaching in elementary social studies. Macmillan.
Cita Chicago Style (17a ed.)Savage, Tom V., y David G. Armstrong. Effective Teaching in Elementary Social Studies. New York: Macmillan, 1987.
Cita MLA (9a ed.)Savage, Tom V., y David G. Armstrong. Effective Teaching in Elementary Social Studies. Macmillan, 1987.
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