Gibbons, J. (1887). Envelope and Calling Card, To: Stephen Farrelly, Esquire From: "James Cardinal Gibbons," January 3, 1887.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Gibbons, James. Envelope and Calling Card, To: Stephen Farrelly, Esquire From: "James Cardinal Gibbons," January 3, 1887. 1887.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Gibbons, James. Envelope and Calling Card, To: Stephen Farrelly, Esquire From: "James Cardinal Gibbons," January 3, 1887. 1887.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.