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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रYen , Swee Kuan. Synthesis, Catalytic Activity Measurement and Characterization of Doped Cobalt Oxide Catalysts for Toxic Gases Emission Treatment. 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रYen , Swee Kuan. Synthesis, Catalytic Activity Measurement and Characterization of Doped Cobalt Oxide Catalysts for Toxic Gases Emission Treatment. 2004.
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