Okrent, D. (2019). The guarded gate: Bigotry, eugenics, and the law that kept two generations of Jews, Italians, and other European immigrants out of America (First Scribner hardcover edition.). Scribner.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Okrent, Daniel. The Guarded Gate: Bigotry, Eugenics, and the Law That Kept Two Generations of Jews, Italians, and Other European Immigrants Out of America. First Scribner hardcover edition. New York: Scribner, 2019.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Okrent, Daniel. The Guarded Gate: Bigotry, Eugenics, and the Law That Kept Two Generations of Jews, Italians, and Other European Immigrants Out of America. First Scribner hardcover edition. Scribner, 2019.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.