Seal B. Bernard. (2002). Academic Encounters; Human Behavior. High Intermediate to Low Advanced: Reading Study Skills Writing (7th ed.). Cambridge, Cambridge University Press, 2002.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Seal B. Bernard. Academic Encounters; Human Behavior. High Intermediate to Low Advanced: Reading Study Skills Writing. 7th ed. Cambridge, Cambridge University Press, 2002, 2002.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Seal B. Bernard. Academic Encounters; Human Behavior. High Intermediate to Low Advanced: Reading Study Skills Writing. 7th ed. Cambridge, Cambridge University Press, 2002, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.