De Cecco, J. P., & Crawford, W. R. (1988). The psychology of learning and instruction: Educational psychology (2d ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)De Cecco, John P., agus William R. Crawford. The Psychology of Learning and Instruction: Educational Psychology. 2d ed. Englewood Cliffs, N.J., New Delhi: Prentice-Hall, 1988.
Lua MLA (8ú heag.)De Cecco, John P., agus William R. Crawford. The Psychology of Learning and Instruction: Educational Psychology. 2d ed. Prentice-Hall, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.