APA (7e ed.) Bronvermelding

Lewis, T. L. T., & Chamberlain, G. (1990). Obstetrics by ten teachers (Fifteenth edition.). Edward Arnold.

Chicago (17e ed.) Bronvermelding

Lewis, T. L. T., en Geoffrey Chamberlain. Obstetrics by Ten Teachers. Fifteenth edition. London Melbourne: Edward Arnold, 1990.

MLA (8e ed.) Bronvermelding

Lewis, T. L. T., en Geoffrey Chamberlain. Obstetrics by Ten Teachers. Fifteenth edition. Edward Arnold, 1990.