Norlena Salamuddin. (2001). Effectiveness of responsibility model for personal and social development in physical education. Universiti Putra Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Norlena Salamuddin. Effectiveness of Responsibility Model for Personal and Social Development in Physical Education. Serdang: Universiti Putra Malaysia, 2001.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Norlena Salamuddin. Effectiveness of Responsibility Model for Personal and Social Development in Physical Education. Universiti Putra Malaysia, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.