APA

Schmidt P., Pruggmayer M., Steinborn A., Schippert C., Staboulidou I., Hillemanns P. & Scharf A. (20080325). Are nuchal translucency, pregnancy associated plasma protein-A or free-beta-human chorionic gonadotropin depending on maternal age? A multicenter study of 8,116 pregnancies. : Archives of gynecology and obstetrics.

Chicago

Schmidt Peter, Pruggmayer Michael, Steinborn Andrea, Schippert Cordula, Staboulidou Ismini, Hillemanns Peter and Scharf Alexander. 20080325. Are nuchal translucency, pregnancy associated plasma protein-A or free-beta-human chorionic gonadotropin depending on maternal age? A multicenter study of 8,116 pregnancies. : Archives of gynecology and obstetrics.

Harvard

Schmidt P., Pruggmayer M., Steinborn A., Schippert C., Staboulidou I., Hillemanns P. and Scharf A. (20080325). Are nuchal translucency, pregnancy associated plasma protein-A or free-beta-human chorionic gonadotropin depending on maternal age? A multicenter study of 8,116 pregnancies. : Archives of gynecology and obstetrics.

MLA

Schmidt Peter, Pruggmayer Michael, Steinborn Andrea, Schippert Cordula, Staboulidou Ismini, Hillemanns Peter and Scharf Alexander. Are nuchal translucency, pregnancy associated plasma protein-A or free-beta-human chorionic gonadotropin depending on maternal age? A multicenter study of 8,116 pregnancies. : Archives of gynecology and obstetrics. 20080325.