Ornstein, A. C., & Levine,Daniel U. (1987). Foundations of education (5th ed.). Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)Ornstein, Allan C., agus Levine,Daniel U. Foundations of Education. 5th ed. Boston: Houghton Mifflin, 1987.
Lua MLA (9ú heag.)Ornstein, Allan C., agus Levine,Daniel U. Foundations of Education. 5th ed. Houghton Mifflin, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.