Fair, J., & Shaftel, F. R. (1967). Effective thinking in the social studies. National Council for the Social Studies.
Lua i Stíl Chicago (17ú heag.)Fair, Jean, agus Fannie R. Shaftel. Effective Thinking in the Social Studies. Washingto, DC: National Council for the Social Studies, 1967.
Lua MLA (9ú heag.)Fair, Jean, agus Fannie R. Shaftel. Effective Thinking in the Social Studies. National Council for the Social Studies, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.