Urbiztondo, L. G. (1979). Class vs. field activities as supplement to the lecture-discussion method: Effects on achievement in high school biology.
Citace podle Chicago (17th ed.)Urbiztondo, Lorna Galvan. Class Vs. Field Activities as Supplement to the Lecture-discussion Method: Effects on Achievement in High School Biology. 1979.
Citace podle MLA (9th ed.)Urbiztondo, Lorna Galvan. Class Vs. Field Activities as Supplement to the Lecture-discussion Method: Effects on Achievement in High School Biology. 1979.
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