Cita APA (7a ed.)

Ostergren, R. C., & Vale, T. R. (1997). Wisconsin land and life. University of Wisconsin Press.

Cita Chicago Style (17a ed.)

Ostergren, Robert Clifford, y Thomas R. Vale. Wisconsin Land and Life. Madison: University of Wisconsin Press, 1997.

Cita MLA (8a ed.)

Ostergren, Robert Clifford, y Thomas R. Vale. Wisconsin Land and Life. University of Wisconsin Press, 1997.