Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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