Travers, R. M. W. (1978). An introduction to educational research (4th ed.). Macmillan.
Lua i Stíl Chicago (17ú heag.)Travers, Robert M. W. An Introduction to Educational Research. 4th ed. New York: Macmillan, 1978.
Lua MLA (8ú heag.)Travers, Robert M. W. An Introduction to Educational Research. 4th ed. Macmillan, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.