Lougheed, L. (2013). Barron's IELTS: International English language testing system. New York: Barron's Educational Series.
استشهاد بنمط شيكاغوLougheed, Lin. Barron's IELTS: International English Language Testing System. New York: Barron's Educational Series, 2013.
MLA استشهادLougheed, Lin. Barron's IELTS: International English Language Testing System. New York: Barron's Educational Series, 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.