Roemer, H., & Kassian, O. (2006). What kind of seeds are these? NorthWord Books for Young Readers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoemer, Heidi, और Olena Kassian. What Kind of Seeds Are These? Minnetonka, Minn.: NorthWord Books for Young Readers, 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRoemer, Heidi, और Olena Kassian. What Kind of Seeds Are These? NorthWord Books for Young Readers, 2006.
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