Whittier, J. G. (1833). Justice and expediency: Or, Slavery considered with a view to its rightful and effectual remedy, abolition.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Whittier, John Greenleaf. Justice and Expediency: Or, Slavery Considered with a View to Its Rightful and Effectual Remedy, Abolition. New-York, 1833.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Whittier, John Greenleaf. Justice and Expediency: Or, Slavery Considered with a View to Its Rightful and Effectual Remedy, Abolition. 1833.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.