ALLEN, K. (2002). ENERGY SCIENCE WORKS FOR KIDS SERIES. EVAN MOOR EDUCATIONAL PUBLISHERS.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रALLEN, KATY.Z. ENERGY SCIENCE WORKS FOR KIDS SERIES. USA: EVAN MOOR EDUCATIONAL PUBLISHERS, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रALLEN, KATY.Z. ENERGY SCIENCE WORKS FOR KIDS SERIES. EVAN MOOR EDUCATIONAL PUBLISHERS, 2002.
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