APA (7 वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, & Harrison, R. M. (2001). Pollution: Causes, effects, and control (4th ed.). Royal Society of Chemistry.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, और Roy M. Harrison. Pollution: Causes, Effects, and Control. 4th ed. Cambridge: Royal Society of Chemistry, 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, और Roy M. Harrison. Pollution: Causes, Effects, and Control. 4th ed. Royal Society of Chemistry, 2001.
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