HAMP-LYONS, L., & HEASLEY, B. (1990). Study writing: A Course in written english for academicand professional purposes. Cambridge University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)HAMP-LYONS, Liz, و Ben HEASLEY. Study Writing: A Course in Written English for Academicand Professional Purposes. New York: Cambridge University Press, 1990.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)HAMP-LYONS, Liz, و Ben HEASLEY. Study Writing: A Course in Written English for Academicand Professional Purposes. Cambridge University Press, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.