Chan, C. W. (2015). Secondary students' perceptions of the importance, difficulty, interest and engagement in learning biology. Universiti Malaysia Sarawak, (UNIMAS).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Chan, Chiew Wair. Secondary Students' Perceptions of the Importance, Difficulty, Interest and Engagement in Learning Biology. Universiti Malaysia Sarawak, (UNIMAS), 2015.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Chan, Chiew Wair. Secondary Students' Perceptions of the Importance, Difficulty, Interest and Engagement in Learning Biology. Universiti Malaysia Sarawak, (UNIMAS), 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.