Whitehead, R. L. (1994). Ground water atlas of the United States. U.S. Geological Survey ; For Sale by Map Distribution.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWhitehead, R. L. Ground Water Atlas of the United States. Reston, Va. : Denver, Colo.: U.S. Geological Survey ; For Sale by Map Distribution, 1994.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWhitehead, R. L. Ground Water Atlas of the United States. U.S. Geological Survey ; For Sale by Map Distribution, 1994.
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