Cita APA (7a ed.)
Ruhe, R. V. (1969). Quaternary landscapes in Iowa ([1st ed.].). Iowa State University Press.
Cita Chicago Style (17a ed.)
Ruhe, Robert V. Quaternary Landscapes in Iowa. [1st ed.]. Ames: Iowa State University Press, 1969.
Cita MLA (9a ed.)
Ruhe, Robert V. Quaternary Landscapes in Iowa. [1st ed.]. Iowa State University Press, 1969.
Precaución: Estas citas no son 100% exactas.