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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZainal Abidin, Nurrul Amilin, Zeno Michael, Mohamed Khatif Tawaf Mohamed Yusof, Azmi Roslan, Siti Shahidah Sharipudin, Shahrul Nizam Mohammad, और Ilya Izyan Shahrul Azhar. An Eco-friendly Concrete Blends from Palm Oil Boiler Ash / Nurrul Amilin Zainal Abidin ... [et Al.]. 2021.
एमएलए (9वां संस्करण) प्रशस्ति पत्रZainal Abidin, Nurrul Amilin, et al. An Eco-friendly Concrete Blends from Palm Oil Boiler Ash / Nurrul Amilin Zainal Abidin ... [et Al.]. 2021.
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