Blough, G. O., & Schwartz, J. (1990). Elementary school science and how to teach it (8th ed.). Harcourt brace.
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Citación estilo Chicago
Blough, Glenn O., and Julius Schwartz. Elementary School Science and How to Teach It. 8th ed. Philadelphia: Harcourt brace, 1990.
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Cita MLA
Blough, Glenn O., and Julius Schwartz. Elementary School Science and How to Teach It. 8th ed. Harcourt brace, 1990.
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