Kolej Universiti Teknikal Kebangsaan Malaysia. Pusat Perkhidmatan Akademik, Mohd. Ridzuan Nordin, D., Liew Kong Yong, D., Mohd Haizal Mohd Husin, & Imran Syakir Mohamad. (2006). Recovery, regeneration, and reuse of spent bleaching clay from palm oil refining waste material. Kolej Universiti Teknikal Kebangsaan Malaysia.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিKolej Universiti Teknikal Kebangsaan Malaysia. Pusat Perkhidmatan Akademik, Dr Mohd. Ridzuan Nordin, Dr Liew Kong Yong, Mohd Haizal Mohd Husin, এবং Imran Syakir Mohamad. Recovery, Regeneration, and Reuse of Spent Bleaching Clay from Palm Oil Refining Waste Material. Ayer Keroh: Kolej Universiti Teknikal Kebangsaan Malaysia, 2006.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিKolej Universiti Teknikal Kebangsaan Malaysia. Pusat Perkhidmatan Akademik, et al. Recovery, Regeneration, and Reuse of Spent Bleaching Clay from Palm Oil Refining Waste Material. Kolej Universiti Teknikal Kebangsaan Malaysia, 2006.