Hyman, R. T. (1973). Approaches in curriculum. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Hyman, Ronald T. Approaches in Curriculum. Englewood Cliffs, N.J.: Prentice-Hall, 1973.
Lua MLA (8ú heag.)Hyman, Ronald T. Approaches in Curriculum. Prentice-Hall, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.