Cita APA (7th ed.)

HAMP-LYONS, L., & HEASLEY, B. (1990). Study writing: A Course in written english for academicand professional purposes. Cambridge University Press.

Cita Chicago (17th ed.)

HAMP-LYONS, Liz, i Ben HEASLEY. Study Writing: A Course in Written English for Academicand Professional Purposes. New York: Cambridge University Press, 1990.

Cita MLA (9th ed.)

HAMP-LYONS, Liz, i Ben HEASLEY. Study Writing: A Course in Written English for Academicand Professional Purposes. Cambridge University Press, 1990.