APA

Venezia R., Zangara C., Comparetto G. & Cittadini E. (20031003). Conservative treatment of ectopic pregnancies using a single echo-guided injection of methotrexate into the gestational sac. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology.

Chicago

Venezia R, Zangara C, Comparetto G and Cittadini E. 20031003. Conservative treatment of ectopic pregnancies using a single echo-guided injection of methotrexate into the gestational sac. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology.

Harvard

Venezia R., Zangara C., Comparetto G. and Cittadini E. (20031003). Conservative treatment of ectopic pregnancies using a single echo-guided injection of methotrexate into the gestational sac. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology.

MLA

Venezia R, Zangara C, Comparetto G and Cittadini E. Conservative treatment of ectopic pregnancies using a single echo-guided injection of methotrexate into the gestational sac. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology. 20031003.