Carin, A. A., & Sund, R. B. (1989). Guided discovery activities for elementary school science (2nd ed.). Merrill.
Citace podle Chicago (17th ed.)Carin, Arthur A., a Robert B. Sund. Guided Discovery Activities for Elementary School Science. 2nd ed. Columbus, Ohio: Merrill, 1989.
Citace podle MLA (9th ed.)Carin, Arthur A., a Robert B. Sund. Guided Discovery Activities for Elementary School Science. 2nd ed. Merrill, 1989.
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