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.
Chicago-referens (17:e uppl.)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.
MLA-referens (8:e uppl.)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.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.