(2019). How organic pollutants poison our health unsafe at any level / by Penny May Hopkins. [electronic resource].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHow Organic Pollutants Poison Our Health Unsafe at Any Level / by Penny May Hopkins. [electronic Resource]. 2019.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHow Organic Pollutants Poison Our Health Unsafe at Any Level / by Penny May Hopkins. [electronic Resource]. 2019.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.