Leahey, T. H., & Harris, R. J. (1989). Human learning (2nd ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Leahey, Thomas Hardy, agus Richard J. Harris. Human Learning. 2nd ed. Englewood Cliffs, N.J: Prentice Hall, 1989.
Lua MLA (9ú heag.)Leahey, Thomas Hardy, agus Richard J. Harris. Human Learning. 2nd ed. Prentice Hall, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.