Owen, H. (2016). How to start a worm bin: Your guide to getting started with worm composting. GroundSwell.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOwen, Henry. How to Start a Worm Bin: Your Guide to Getting Started with Worm Composting. Summertown, TN: GroundSwell, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रOwen, Henry. How to Start a Worm Bin: Your Guide to Getting Started with Worm Composting. GroundSwell, 2016.
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