Westmeyer, P. (1969). A summary of research in science education for the years 1965-67, secondary level. ERIC.
Lua i Stíl Chicago (17ú heag.)Westmeyer, Paul. A Summary of Research in Science Education for the Years 1965-67, Secondary Level. Ohio, Estados Unidos: ERIC, 1969.
Lua MLA (9ú heag.)Westmeyer, Paul. A Summary of Research in Science Education for the Years 1965-67, Secondary Level. ERIC, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.