Savage, T. V., & Armstrong, D. G. (2004). Effective teaching in elementary social studies (5th ed.). Pearson/Merrill Prentice Hall.
Cita Chicago Style (17a ed.)Savage, Tom V., y David G. Armstrong. Effective Teaching in Elementary Social Studies. 5th ed. Upper Saddle River, N.J: Pearson/Merrill Prentice Hall, 2004.
Cita MLA (9a ed.)Savage, Tom V., y David G. Armstrong. Effective Teaching in Elementary Social Studies. 5th ed. Pearson/Merrill Prentice Hall, 2004.
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