Hutchinson, T., & Tom Hutchinson. (1997). Lifelines: Pre-Intermediate: Workbook With Key. Oxford: Oxford University Press.
استشهاد بنمط شيكاغوHutchinson, Tom, و Tom Hutchinson. Lifelines: Pre-Intermediate: Workbook With Key. Oxford: Oxford University Press, 1997.
MLA استشهادHutchinson, Tom, و Tom Hutchinson. Lifelines: Pre-Intermediate: Workbook With Key. Oxford: Oxford University Press, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.