Gilchrist, R. S. (1974). Curriculum Development: A humanized systems approach. Phi Delta Kappa.
Lua i Stíl Chicago (17ú heag.)Gilchrist, Robert S. Curriculum Development: A Humanized Systems Approach. USA: Phi Delta Kappa, 1974.
Lua MLA (9ú heag.)Gilchrist, Robert S. Curriculum Development: A Humanized Systems Approach. Phi Delta Kappa, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.