Spyker, J. (1848). A collection of geographical, moral, religious, Biblical, political and other chapters: In the form questions and answers ... Brady and Wilson.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Spyker, Joel. A Collection of Geographical, Moral, Religious, Biblical, Political and Other Chapters: In the Form Questions and Answers ... Brookville, PA.: Brady and Wilson, 1848.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Spyker, Joel. A Collection of Geographical, Moral, Religious, Biblical, Political and Other Chapters: In the Form Questions and Answers ... Brady and Wilson, 1848.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.