Sund, R. B., & Trowbridge, L. W. (1974). Student-centered teaching in the secondary school. Merrill.
Citace podle Chicago (17th ed.)Sund, Robert B., a Leslie W. Trowbridge. Student-centered Teaching in the Secondary School. Columbus, Ohio: Merrill, 1974.
Citace podle MLA (8th ed.)Sund, Robert B., a Leslie W. Trowbridge. Student-centered Teaching in the Secondary School. Merrill, 1974.
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