Wolverton, B. C. (1997). How to grow fresh air: 50 houseplants that purify your home or office. Penguin Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWolverton, B. C. How to Grow Fresh Air: 50 Houseplants That Purify Your Home or Office. New York: Penguin Books, 1997.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWolverton, B. C. How to Grow Fresh Air: 50 Houseplants That Purify Your Home or Office. Penguin Books, 1997.
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