Roberts, C. L., Bell, J. C., Ford, J. B., Hadfield, R. M., Algert, C. S., & Morris, J. M. (2008). The Accuracy of Reporting of the Hypertensive Disorders of Pregnancy in Population Health Data. Informa Healthcare.

Roberts, Christine L., Jane C. Bell, Jane B. Ford, Ruth M. Hadfield, Charles S. Algert, i Jonathan M. Morris. The Accuracy of Reporting of the Hypertensive Disorders of Pregnancy in Population Health Data. Informa Healthcare, 2008.

Roberts, Christine L., et al. The Accuracy of Reporting of the Hypertensive Disorders of Pregnancy in Population Health Data. Informa Healthcare, 2008.