Strother, R. (2019). Rocks and minerals. National Geographic Kids.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStrother, Ruth. Rocks and Minerals. Washington, DC: National Geographic Kids, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रStrother, Ruth. Rocks and Minerals. National Geographic Kids, 2019.
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