APA citiranje

Abdullah, P., Landy, C. K., McCague, H., Macpherson, A., & Tamim, H. (2019). Factors associated with the timing of the first prenatal ultrasound in Canada. BMC Pregnancy Childbirth.

Citação norma Chicago

Abdullah, Peri, Christine Kurtz Landy, Hugh McCague, Alison Macpherson, and Hala Tamim. "Factors Associated With the Timing of the First Prenatal Ultrasound in Canada." BMC Pregnancy Childbirth 2019.

MLA citiranje

Abdullah, Peri, et al. "Factors Associated With the Timing of the First Prenatal Ultrasound in Canada." BMC Pregnancy Childbirth 2019.