Norjan Yusof. (1998). Simulated leaf photosynthesis of vegetation on closed landfill sites in Kuala Lumpur. Faculty of Science and Environmental Studies, Universiti Putra Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Norjan Yusof. Simulated Leaf Photosynthesis of Vegetation on Closed Landfill Sites in Kuala Lumpur. Serdang: Faculty of Science and Environmental Studies, Universiti Putra Malaysia, 1998.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Norjan Yusof. Simulated Leaf Photosynthesis of Vegetation on Closed Landfill Sites in Kuala Lumpur. Faculty of Science and Environmental Studies, Universiti Putra Malaysia, 1998.
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