APA

Gyselaers W. J. A., Stoop D. P. M., Van Holsbeke C. D. Y. J., Van Herck E. J. H., Straetmans D. P. L., Vereecken A. J., Ombelet W. U. A. M. & Nijhuis J. G. (20070508). Screening for fetal trisomy 21: voluntary registration of pregnancy outcome is invalid. : Genetic counseling (Geneva, Switzerland).

Chicago

Gyselaers W J A, Stoop D P M, Van Holsbeke C D Y J, Van Herck E J H, Straetmans D P L, Vereecken A J, Ombelet W U A M and Nijhuis J G. 20070508. Screening for fetal trisomy 21: voluntary registration of pregnancy outcome is invalid. : Genetic counseling (Geneva, Switzerland).

Harvard

Gyselaers W. J. A., Stoop D. P. M., Van Holsbeke C. D. Y. J., Van Herck E. J. H., Straetmans D. P. L., Vereecken A. J., Ombelet W. U. A. M. and Nijhuis J. G. (20070508). Screening for fetal trisomy 21: voluntary registration of pregnancy outcome is invalid. : Genetic counseling (Geneva, Switzerland).

MLA

Gyselaers W J A, Stoop D P M, Van Holsbeke C D Y J, Van Herck E J H, Straetmans D P L, Vereecken A J, Ombelet W U A M and Nijhuis J G. Screening for fetal trisomy 21: voluntary registration of pregnancy outcome is invalid. : Genetic counseling (Geneva, Switzerland). 20070508.