Ellis, B. W. (2007). Covering ground: Unexpected ideas for landscaping with colorful, low-maintenance ground covers. Storey Pub..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEllis, Barbara W. Covering Ground: Unexpected Ideas for Landscaping with Colorful, Low-maintenance Ground Covers. North Adams, Mass.: Storey Pub., 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEllis, Barbara W. Covering Ground: Unexpected Ideas for Landscaping with Colorful, Low-maintenance Ground Covers. Storey Pub., 2007.
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