First-trimester US parameters of failed pregnancy.

MLA

Rowling, S. E., et al. “First-Trimester US Parameters of Failed Pregnancy.” Radiology, vol. 203, no. 1, Apr. 1997, pp. 211–17. EBSCOhost, https://doi.org/10.1148/radiology.203.1.9122395.

APA

Rowling, S. E., Coleman, B. G., Langer, J. E., Arger, P. H., Nisenbaum, H. L., & Horii, S. C. (1997). First-trimester US parameters of failed pregnancy. Radiology, 203(1), 211–217. https://doi.org/10.1148/radiology.203.1.9122395

Chicago

Rowling, S E, B G Coleman, J E Langer, P H Arger, H L Nisenbaum, and S C Horii. 1997. “First-Trimester US Parameters of Failed Pregnancy.” Radiology 203 (1): 211–17. doi:10.1148/radiology.203.1.9122395.