Kurfman, D. G. (1977). Developing decision marking skills. National Council for The Social Studies.
Lua i Stíl Chicago (17ú heag.)Kurfman, Dana G. Developing Decision Marking Skills. National Council for The Social Studies, 1977.
Lua MLA (9ú heag.)Kurfman, Dana G. Developing Decision Marking Skills. National Council for The Social Studies, 1977.
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