Ornstein, A. C., & Levine,Daniel U. (1987). Foundations of education (5th ed.). Houghton Mifflin.
Cita Chicago (17th ed.)Ornstein, Allan C., i Levine,Daniel U. Foundations of Education. 5th ed. Boston: Houghton Mifflin, 1987.
Cita MLA (9th ed.)Ornstein, Allan C., i Levine,Daniel U. Foundations of Education. 5th ed. Houghton Mifflin, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.