St. Helen, G., Jacob, P., & Benowitz, N. L. (2013). Stability of the Nicotine Metabolite Ratio in Smokers of Progressively Reduced Nicotine Content Cigarettes. Oxford University Press.
استشهاد بنمط شيكاغوSt. Helen, Gideon, Peyton Jacob, و Neal L. Benowitz. Stability of the Nicotine Metabolite Ratio in Smokers of Progressively Reduced Nicotine Content Cigarettes. Oxford University Press, 2013.
MLA استشهادSt. Helen, Gideon, Peyton Jacob, و Neal L. Benowitz. Stability of the Nicotine Metabolite Ratio in Smokers of Progressively Reduced Nicotine Content Cigarettes. Oxford University Press, 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.