Nielsen, H. D., & Kirk, D. H. (1973). Learning environments and learning outcomes: A review of research literature. Southeast Asia Development Advisory Group of the Asia Society.
Lua i Stíl Chicago (17ú heag.)Nielsen, H. Dean, agus Diana H. Kirk. Learning Environments and Learning Outcomes: A Review of Research Literature. New York: Southeast Asia Development Advisory Group of the Asia Society, 1973.
Lua MLA (8ú heag.)Nielsen, H. Dean, agus Diana H. Kirk. Learning Environments and Learning Outcomes: A Review of Research Literature. Southeast Asia Development Advisory Group of the Asia Society, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.