Wellman, C. H., & Cole, P. (2011). Debating the ethics of immigration: Is there a right to exclude? Oxford University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wellman, Christopher Heath, و Phillip Cole. Debating the Ethics of Immigration: Is There a Right to Exclude? Oxford: Oxford University Press, 2011.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Wellman, Christopher Heath, و Phillip Cole. Debating the Ethics of Immigration: Is There a Right to Exclude? Oxford University Press, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.