Rugg, H., & Withers, W. (1955). Social foundations of education. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Rugg, Harold, agus William Withers. Social Foundations of Education. New York: Prentice-Hall, 1955.
Lua MLA (8ú heag.)Rugg, Harold, agus William Withers. Social Foundations of Education. Prentice-Hall, 1955.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.