APA
Roiz-Hernández J., de J Cabello-Martínez J. & Fernández-Mejía M. (20070717). Human chorionic gonadotropin levels between 16 and 21 weeks of pregnancy and prediction of pre-eclampsia. : International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics.
Chicago
Roiz-Hernández J, de J Cabello-Martínez J and Fernández-Mejía M. 20070717. Human chorionic gonadotropin levels between 16 and 21 weeks of pregnancy and prediction of pre-eclampsia. : International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics.
Harvard
Roiz-Hernández J., de J Cabello-Martínez J. and Fernández-Mejía M. (20070717). Human chorionic gonadotropin levels between 16 and 21 weeks of pregnancy and prediction of pre-eclampsia. : International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics.
MLA
Roiz-Hernández J, de J Cabello-Martínez J and Fernández-Mejía M. Human chorionic gonadotropin levels between 16 and 21 weeks of pregnancy and prediction of pre-eclampsia. : International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics. 20070717.