Bridgman, H. A. Global air pollution problems for the 1990s. John Wiley and Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBridgman, Howard A. Global Air Pollution Problems for the 1990s. John Wiley and Sons.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBridgman, Howard A. Global Air Pollution Problems for the 1990s. John Wiley and Sons.
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