Courtney, E. W. (1965). Applied research in education. Littlefield, Adams.
Lua i Stíl Chicago (17ú heag.)Courtney, E. Wayne. Applied Research in Education. Totowa, N.J.: Littlefield, Adams, 1965.
Lua MLA (8ú heag.)Courtney, E. Wayne. Applied Research in Education. Littlefield, Adams, 1965.
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