توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Johnston, J. F. W. (1850). Lectures on the general relations which science bears to practical agriculture: Delivered before the New-York State Agricultural Society. C.M. Saxton.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Johnston, Jas. F. W. Lectures on the General Relations Which Science Bears to Practical Agriculture: Delivered Before the New-York State Agricultural Society. New York: C.M. Saxton, 1850.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Johnston, Jas. F. W. Lectures on the General Relations Which Science Bears to Practical Agriculture: Delivered Before the New-York State Agricultural Society. C.M. Saxton, 1850.