Johansson, M., Appleby, P., Allen, N., Travis, R., Roddam, A., Egevad, L., . . . Boeing, H. (2008). Circulating concentrations of folate and vitamin B12 in relation to prostate cancer risk: Results from the European Prospective Investigation into Cancer and Nutrition study.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Johansson, M., et al. Circulating Concentrations of Folate and Vitamin B12 in Relation to Prostate Cancer Risk: Results from the European Prospective Investigation into Cancer and Nutrition Study. 2008.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Johansson, M., et al. Circulating Concentrations of Folate and Vitamin B12 in Relation to Prostate Cancer Risk: Results from the European Prospective Investigation into Cancer and Nutrition Study. 2008.
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