Klein, S. B. (1996). Learning: Principles and applications (3rd ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Klein, Stephen B. Learning: Principles and Applications. 3rd ed. New York: McGraw-Hill, 1996.
Lua MLA (8ú heag.)Klein, Stephen B. Learning: Principles and Applications. 3rd ed. McGraw-Hill, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.