APA (7th ed.) Citation

van Limburg Stirum, E. V. J., van der Windt, L. I., van Dijk, C. E., van Baar, A. L., Leemhuis, A. G., van Wely, M., . . . Pajkrt, E. (2022). Pessary or progesterone to prevent preterm birth in women with short cervical length: Protocol of the 4–6 year follow-up of a randomised controlled trial (Quadruple-P). BMJ open, 12(8), e064049. https://doi.org/10.1136/bmjopen-2022-064049

Chicago Style (17th ed.) Citation

van Limburg Stirum, Emilie V J., et al. "Pessary or Progesterone to Prevent Preterm Birth in Women with Short Cervical Length: Protocol of the 4–6 Year Follow-up of a Randomised Controlled Trial (Quadruple-P)." BMJ Open 12, no. 8 (2022): e064049. https://doi.org/10.1136/bmjopen-2022-064049.

MLA (9th ed.) Citation

van Limburg Stirum, Emilie V J., et al. "Pessary or Progesterone to Prevent Preterm Birth in Women with Short Cervical Length: Protocol of the 4–6 Year Follow-up of a Randomised Controlled Trial (Quadruple-P)." BMJ Open, vol. 12, no. 8, 2022, p. e064049, https://doi.org/10.1136/bmjopen-2022-064049.