APA

Betel C., Atri M., Arenson A., Khalifa M., Osborne R. & Tomlinson G. (20061207). Sonographic diagnosis of gestational trophoblastic disease and comparison with retained products of conception. : Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine.

Chicago

Betel Cara, Atri Mostafa, Arenson Anna-Marie, Khalifa Mahmoud, Osborne Raymond and Tomlinson George. 20061207. Sonographic diagnosis of gestational trophoblastic disease and comparison with retained products of conception. : Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine.

Harvard

Betel C., Atri M., Arenson A., Khalifa M., Osborne R. and Tomlinson G. (20061207). Sonographic diagnosis of gestational trophoblastic disease and comparison with retained products of conception. : Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine.

MLA

Betel Cara, Atri Mostafa, Arenson Anna-Marie, Khalifa Mahmoud, Osborne Raymond and Tomlinson George. Sonographic diagnosis of gestational trophoblastic disease and comparison with retained products of conception. : Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine. 20061207.