1. Adams, F., trans. 1849The Genuine Works of Hippocrates, second vol. London: Sydenham Society.
2. American College of Obstetricians and Gynecologists (ACOG) 1978 Induction of Labor.Technical Bulletin 49. Washington, D.C.
3. 1987 Induction and Augmentation of Labor.Technical Bulletin 110. Washington, D.C.
4. Artschwanger, K. M. 1982Anthropology of Human Birth. Philadelphia: F. A. Davis.
5. Barber H. R. K., E. A. Graber, and A. Orlando 1972 Augmented Labor.Obstetrics and Gynecology 39:933–939.