Hartley, J. P. D. (1998). Learning and studying: A research perspective. Routledge.
Lua i Stíl Chicago (17ú heag.)Hartley, James Ph. D. Learning and Studying: A Research Perspective. London: Routledge, 1998.
Lua MLA (9ú heag.)Hartley, James Ph. D. Learning and Studying: A Research Perspective. Routledge, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.