Marsh, C. J., & Willis, G. (1995). Curriculum: Alternative approaches, ongoing issues. Merrill.
Lua i Stíl Chicago (17ú heag.)Marsh, Colin J., agus George Willis. Curriculum: Alternative Approaches, Ongoing Issues. Englewood Cliffs, N.J.: Merrill, 1995.
Lua MLA (8ú heag.)Marsh, Colin J., agus George Willis. Curriculum: Alternative Approaches, Ongoing Issues. Merrill, 1995.
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