References

Prof. Dr. Wiknjosastro Hanifa, DSOG, et al, 1999:282
Pusdiknakes, MOH, 1990; 9
Manuaba, Prof.dr.Ida Gde.Penuntun Registrar Good Clinical Obstetrics And Ginekologi.1993.EGC.Jakarta
Luz Heller. Emergency Gynaecology and Obstetri.1981.EGC.Jakarta.
Manuaba, Prof.Dr.Ida BagusGde, SpOG. Capita Selekta Routine Management of Obstetrics Gynecology
              and KB.2001. EGC. Jakarta.
Bobak, Irene M, RN, PhD, FAAN et al. Maternity Nursing.1995.Mosby.
Mitayani, SSt.m.Biomed. Nursing Maternitas.2009.Salemba Medika. Jakarta