APA (7th ed.) Citation

JL, D., GM, H., CS, H., & P, B. (1997). Early transvaginal ultrasound following an accurately dated pregnancy: The importance of finding a yolk sac or fetal heart motion. Human reproduction (Oxford, England), 12(12), 2820. https://doi.org/10.1093/humrep/12.12.2820

Chicago Style (17th ed.) Citation

JL, Deaton, Honoré GM, Huffman CS, and Bauguess P. "Early Transvaginal Ultrasound Following an Accurately Dated Pregnancy: The Importance of Finding a Yolk Sac or Fetal Heart Motion." Human Reproduction (Oxford, England) 12, no. 12 (1997): 2820. https://doi.org/10.1093/humrep/12.12.2820.

MLA (9th ed.) Citation

JL, Deaton, et al. "Early Transvaginal Ultrasound Following an Accurately Dated Pregnancy: The Importance of Finding a Yolk Sac or Fetal Heart Motion." Human Reproduction (Oxford, England), vol. 12, no. 12, 1997, p. 2820, https://doi.org/10.1093/humrep/12.12.2820.