Cita APA (7th ed.)
Borchert, J. R. (1987). America's northern heartland. University of Minnesota Press.
Cita Chicago (17th ed.)
Borchert, John R. America's Northern Heartland. Minneapolis: University of Minnesota Press, 1987.
Cita MLA (9th ed.)
Borchert, John R. America's Northern Heartland. University of Minnesota Press, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.