APA

Volcik K. A., Shaw G. M., Lammer E. J., Zhu H. & Finnell R. H. (20031027). Evaluation of infant methylenetetrahydrofolate reductase genotype, maternal vitamin use, and risk of high versus low level spina bifida defects. : Birth defects research. Part A, Clinical and molecular teratology.

Chicago

Volcik Kelly A, Shaw Gary M, Lammer Edward J, Zhu Huiping and Finnell Richard H. 20031027. Evaluation of infant methylenetetrahydrofolate reductase genotype, maternal vitamin use, and risk of high versus low level spina bifida defects. : Birth defects research. Part A, Clinical and molecular teratology.

Harvard

Volcik K. A., Shaw G. M., Lammer E. J., Zhu H. and Finnell R. H. (20031027). Evaluation of infant methylenetetrahydrofolate reductase genotype, maternal vitamin use, and risk of high versus low level spina bifida defects. : Birth defects research. Part A, Clinical and molecular teratology.

MLA

Volcik Kelly A, Shaw Gary M, Lammer Edward J, Zhu Huiping and Finnell Richard H. Evaluation of infant methylenetetrahydrofolate reductase genotype, maternal vitamin use, and risk of high versus low level spina bifida defects. : Birth defects research. Part A, Clinical and molecular teratology. 20031027.