Lipham, J. M. . [. o. c., & Fruth, M. J. (1976). The principal and individually guided education. Addison-Wesley Pub. Co..
Lua i Stíl Chicago (17ú heag.)Lipham, James M. [from old catalog], agus Marvin J. Fruth. The Principal and Individually Guided Education. Reading, Mass.: Addison-Wesley Pub. Co., 1976.
Lua MLA (8ú heag.)Lipham, James M. [from old catalog], agus Marvin J. Fruth. The Principal and Individually Guided Education. Addison-Wesley Pub. Co., 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.