Bradley, S., & Stevenson, J. A. (1947). Walt Whitman's Backward Glances: "A Backward Glance o'er Travel'd Roads," and Two Contributory Essays Hitherto Uncollected. University of Pennsylvania Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bradley, Sculley, و John A. Stevenson. Walt Whitman's Backward Glances: "A Backward Glance O'er Travel'd Roads," and Two Contributory Essays Hitherto Uncollected. Philadelphia: University of Pennsylvania Press, 1947.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Bradley, Sculley, و John A. Stevenson. Walt Whitman's Backward Glances: "A Backward Glance O'er Travel'd Roads," and Two Contributory Essays Hitherto Uncollected. University of Pennsylvania Press, 1947.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.