توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Stephen, J., & Wilberforce, W. (1816). A defence of the bill for the registration of slaves, in letters to William Wilberforce, Esq. M.P. Printed for J. Butterworth and Son, and J. Hatchard.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Stephen, James, و William Wilberforce. A Defence of the Bill for the Registration of Slaves, in Letters to William Wilberforce, Esq. M.P. London: Printed for J. Butterworth and Son, and J. Hatchard, 1816.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Stephen, James, و William Wilberforce. A Defence of the Bill for the Registration of Slaves, in Letters to William Wilberforce, Esq. M.P. Printed for J. Butterworth and Son, and J. Hatchard, 1816.