APA (7th ed.) Citation

Sadovnick, A., Yee, I., & Ebers, G. (2005). Multiple sclerosis and birth order: A longitudinal cohort study.

Chicago Style (17th ed.) Citation

Sadovnick, A., I. Yee, and G. Ebers. Multiple Sclerosis and Birth Order: A Longitudinal Cohort Study. 2005.

MLA (9th ed.) Citation

Sadovnick, A., et al. Multiple Sclerosis and Birth Order: A Longitudinal Cohort Study. 2005.