Catrin Brown. (2014). Higher level Chemistry (2nd edition.). Pearson education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCatrin Brown. Higher Level Chemistry. 2nd edition. Essex: Pearson education, 2014.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCatrin Brown. Higher Level Chemistry. 2nd edition. Pearson education, 2014.
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