Hamp-Lyons, L., & Heasley, B. (1987). Study writing: A course in written english for academic and professional purposes. Cambridge University Press.
Citazione stile Chigago Style (17a edizione)Hamp-Lyons, Liz, e Ben Heasley. Study Writing: A Course in Written English for Academic and Professional Purposes. Cambridge: Cambridge University Press, 1987.
Citatione MLA (9a ed.)Hamp-Lyons, Liz, e Ben Heasley. Study Writing: A Course in Written English for Academic and Professional Purposes. Cambridge University Press, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.