Hipple, T. W., & Allen, D. W. (1974). The future of education: 1975-2000. Goodyear Pub.
Lua i Stíl Chicago (17ú heag.)Hipple, Theodore W., agus Dwight William Allen. The Future of Education: 1975-2000. Pacific Palisades, Calif: Goodyear Pub, 1974.
Lua MLA (9ú heag.)Hipple, Theodore W., agus Dwight William Allen. The Future of Education: 1975-2000. Goodyear Pub, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.