APA
Severi F. M., Bocchi C., Voltolini C., Borges L. E., Florio P. & Petraglia F. (20090119). Thickness of fetal membranes: a possible ultrasound marker for preterm delivery. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology.
Chicago
Severi F M, Bocchi C, Voltolini C, Borges L E, Florio P and Petraglia F. 20090119. Thickness of fetal membranes: a possible ultrasound marker for preterm delivery. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology.
Harvard
Severi F. M., Bocchi C., Voltolini C., Borges L. E., Florio P. and Petraglia F. (20090119). Thickness of fetal membranes: a possible ultrasound marker for preterm delivery. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology.
MLA
Severi F M, Bocchi C, Voltolini C, Borges L E, Florio P and Petraglia F. Thickness of fetal membranes: a possible ultrasound marker for preterm delivery. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology. 20090119.