International Society of Ultrasound in Obstetrics and Gynecology. (1991). Ultrasound in obstetrics & gynecology. Parthenon Publishing.
Παραπομπή σε μορφή Chicago (17η εκδ.)International Society of Ultrasound in Obstetrics and Gynecology. Ultrasound in Obstetrics & Gynecology. Carnforth, Inglaterra: Parthenon Publishing, 1991.
Παραπομπή σε μορφή MLA (8th εκδ.)International Society of Ultrasound in Obstetrics and Gynecology. Ultrasound in Obstetrics & Gynecology. Parthenon Publishing, 1991.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.