Hergenhahn, B. R., & Olson, M. H. (1993). An introduction to theories of learning (4th ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Hergenhahn, B. R., agus Matthew H. Olson. An Introduction to Theories of Learning. 4th ed. Englewood Cliffs, N. J: Prentice-Hall, 1993.
Lua MLA (9ú heag.)Hergenhahn, B. R., agus Matthew H. Olson. An Introduction to Theories of Learning. 4th ed. Prentice-Hall, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.