Jeffery, a. S. (2009). The effect of peer-to-peer health education on the perception of the smoking outcomes among adolescents in Kuching, Sarawak, 2007.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Jeffery, anak Stephen. The Effect of Peer-to-peer Health Education on the Perception of the Smoking Outcomes Among Adolescents in Kuching, Sarawak, 2007. 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Jeffery, anak Stephen. The Effect of Peer-to-peer Health Education on the Perception of the Smoking Outcomes Among Adolescents in Kuching, Sarawak, 2007. 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.