APA

Bilardo C. M., Timmerman E., De Medina P. G. R. & Clur S. A. (20110519). Low-resistance hepatic artery flow in first-trimester fetuses: an ominous sign. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology.

Chicago

Bilardo C M, Timmerman E, De Medina P G Robles and Clur S A. 20110519. Low-resistance hepatic artery flow in first-trimester fetuses: an ominous sign. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology.

Harvard

Bilardo C. M., Timmerman E., De Medina P. G. R. and Clur S. A. (20110519). Low-resistance hepatic artery flow in first-trimester fetuses: an ominous sign. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology.

MLA

Bilardo C M, Timmerman E, De Medina P G Robles and Clur S A. Low-resistance hepatic artery flow in first-trimester fetuses: an ominous sign. : Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology. 20110519.