Citazione APA

Longwell, C. R. (1941). Outlines of Physical Geology. John Wiley &Sons, Inc.

Stile di citazione Chicago

Longwell, Chester R.et.al. Outlines of Physical Geology. New York: John Wiley &Sons, Inc, 1941.

Citazione MLA

Longwell, Chester R.et.al. Outlines of Physical Geology. John Wiley &Sons, Inc, 1941.