Grambs, J. D. (1958). Modern methods in secondary education (Rev. ed.). Dryden Press.
Lua i Stíl Chicago (17ú heag.)Grambs, Jean Dresden. Modern Methods in Secondary Education. Rev. ed. New York: Dryden Press, 1958.
Lua MLA (8ú heag.)Grambs, Jean Dresden. Modern Methods in Secondary Education. Rev. ed. Dryden Press, 1958.
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