American Geological Institute. (1994). Directory of geoscience departments, North America. American Geological Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAmerican Geological Institute. Directory of Geoscience Departments, North America. Alexandria, Va: American Geological Institute, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAmerican Geological Institute. Directory of Geoscience Departments, North America. American Geological Institute, 1994.
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