SMITH, H. L., & SMITH, J. R. (1959). An introduction to research in education. Educational Pub.
Lua i Stíl Chicago (17ú heag.)SMITH, Henry Lester, agus Johnnie Rutland SMITH. An Introduction to Research in Education. Indiana: Educational Pub, 1959.
Lua MLA (9ú heag.)SMITH, Henry Lester, agus Johnnie Rutland SMITH. An Introduction to Research in Education. Educational Pub, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.