Clarke, R., Smith, A., Jobst, K., Refsum, H., Sutton, L., & Ueland, P. (1998). Folate, vitamin B12, and serum total homocysteine levels in confirmed Alzheimer disease.
Chicago-viite (17. p.)Clarke, R., A. Smith, K. Jobst, H. Refsum, L. Sutton, ja P. Ueland. Folate, Vitamin B12, and Serum Total Homocysteine Levels in Confirmed Alzheimer Disease. 1998.
MLA-viite (9. p.)Clarke, R., et al. Folate, Vitamin B12, and Serum Total Homocysteine Levels in Confirmed Alzheimer Disease. 1998.
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