Thakur, J. K. (2002). Ultrasonic assessment of early pregnancy bleeding.
芝加哥风格引文Thakur, Jay Kumar. Ultrasonic Assessment of Early Pregnancy Bleeding. 2002.
MLA引文Thakur, Jay Kumar. Ultrasonic Assessment of Early Pregnancy Bleeding. 2002.
警告：这些引文格式不一定是100％准确.