Mohd Hasrul Kamarulzaman. (2004). The teaching of mathematics and science in English: A study in the perceptions of the roles of heads of Mathematics and Science Departments towards curriculum change in selected schools in the zone of Bangsar. Fakulti Sains Sosial dan Kemanusiaan, Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Mohd Hasrul Kamarulzaman. The Teaching of Mathematics and Science in English: A Study in the Perceptions of the Roles of Heads of Mathematics and Science Departments Towards Curriculum Change in Selected Schools in the Zone of Bangsar. Bangi: Fakulti Sains Sosial dan Kemanusiaan, Universiti Kebangsaan Malaysia, 2004.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Mohd Hasrul Kamarulzaman. The Teaching of Mathematics and Science in English: A Study in the Perceptions of the Roles of Heads of Mathematics and Science Departments Towards Curriculum Change in Selected Schools in the Zone of Bangsar. Fakulti Sains Sosial dan Kemanusiaan, Universiti Kebangsaan Malaysia, 2004.