Merck, E. The Testing of Water: A Selection of Chemical Methods for Practical Use. E. Merck.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMerck, E. The Testing of Water: A Selection of Chemical Methods for Practical Use. E. Merck.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMerck, E. The Testing of Water: A Selection of Chemical Methods for Practical Use. E. Merck.
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