Hamp-Lyons, L., & Heasley, B. (2006). Study writing: A course in writing skills for academic purposes (2nd ed.). Cambridge University Press.

Hamp-Lyons, Liz, and Ben Heasley. Study Writing: A Course in Writing Skills for Academic Purposes. 2nd ed. Cambridge ; New York: Cambridge University Press, 2006.

Hamp-Lyons, Liz, and Ben Heasley. Study Writing: A Course in Writing Skills for Academic Purposes. 2nd ed. Cambridge University Press, 2006.