Cita APA

Ehrenberg, R. E. 1. (1975). Pattern and process research in historical geography. Washington, D. C.: Howard University Press.

Citación estilo Chicago

Ehrenberg, Ralph E. 1937-. Pattern and Process Research in Historical Geography. Washington, D. C.: Howard University Press, 1975.

Cita MLA

Ehrenberg, Ralph E. 1937-. Pattern and Process Research in Historical Geography. Washington, D. C.: Howard University Press, 1975.