APA aipamena

Kayem, G., Kurinczuk, J., Lewis, G., Golightly, S., Brocklehurst, P., & Knight, M. (2011). Risk factors for progression from severe maternal morbidity to death: A national cohort study. Public Library of Science.

Chicago Style aipamena

Kayem, G., J. Kurinczuk, G. Lewis, S. Golightly, P. Brocklehurst, and M. Knight. Risk Factors for Progression from Severe Maternal Morbidity to Death: A National Cohort Study. Public Library of Science, 2011.

MLA aipamena

Kayem, G., et al. Risk Factors for Progression from Severe Maternal Morbidity to Death: A National Cohort Study. Public Library of Science, 2011.