Dangour, A., Allen, E., Clarke, R., Elbourne, D., Fasey, N., Fletcher, A., . . . Uauy, R. (2011). A randomised controlled trial investigating the effect of vitamin B12 supplementation on neurological function in healthy older people: The Older People and Enhanced Neurological function (OPEN) study protocol [ISRCTN54195799].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Dangour, A., et al. A Randomised Controlled Trial Investigating the Effect of Vitamin B12 Supplementation on Neurological Function in Healthy Older People: The Older People and Enhanced Neurological Function (OPEN) Study Protocol [ISRCTN54195799]. 2011.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Dangour, A., et al. A Randomised Controlled Trial Investigating the Effect of Vitamin B12 Supplementation on Neurological Function in Healthy Older People: The Older People and Enhanced Neurological Function (OPEN) Study Protocol [ISRCTN54195799]. 2011.