Saiful Islam. (2002). Effects of selective logging on tree species diversity, stand structure and physical environment of tropical hill dipterocarp forest of Peninsular Malaysia. Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Saiful Islam. Effects of Selective Logging on Tree Species Diversity, Stand Structure and Physical Environment of Tropical Hill Dipterocarp Forest of Peninsular Malaysia. Bangi: Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia, 2002.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Saiful Islam. Effects of Selective Logging on Tree Species Diversity, Stand Structure and Physical Environment of Tropical Hill Dipterocarp Forest of Peninsular Malaysia. Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia, 2002.