Cita APA (7a ed.)

Danhof, C. H. (1969). Change in agriculture: The northern United States, 1820-1870. Harvard University Press.

Cita Chicago Style (17a ed.)

Danhof, Clarence H. Change in Agriculture: The Northern United States, 1820-1870. Cambridge: Harvard University Press, 1969.

Cita MLA (8a ed.)

Danhof, Clarence H. Change in Agriculture: The Northern United States, 1820-1870. Harvard University Press, 1969.