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Чикаго-гийн эшлэл (17 дахь хэвлэлт)Ahmad, 561482 Umi Kalthom, Prof. Dato' Ir. Dr Zaini Ujang, Huey Woon Chong, ба Asian Science and Technology Congress (4th : 2002 : Kuala Lumpur). Quantitative Determination of Organochlorine Pesticides and Polycyclic Aromatic Hydrocarbons in Sewage Sludge. Skudai : Universiti Teknologi Malaysia, 2002.
MLA -ийн эшлэл (9 дэх хэвлэлт)Ahmad, 561482 Umi Kalthom, et al. Quantitative Determination of Organochlorine Pesticides and Polycyclic Aromatic Hydrocarbons in Sewage Sludge. Skudai : Universiti Teknologi Malaysia, 2002.