1. 1F. Al-Azzawi (1990 )A Colour Atlas of Childbirth and Obstetric Techniques. Wolf Publishing Ltd, London.
2. 2S. Arulkumaran (1996 ) Poor progress in labor including augmentation, malpositions and malpresentations . In:High Risk Pregnancy - Management Options3rd edn (James D.K., Steer P.J., Weiner C.P. & Gonik B. eds). W.B. Saunders Company Ltd, London, pp. 1061-1075.
3. 3J.M. Beazley (1986 ) Natural labour and it's active management .Dewhurst Text Book of Obstetrics and Gynaecology for Post Graduates4th edn (Whitfield C.R. ed). Blackwell Scientific Publications, Oxford, pp. 338-356.
4. Lack of Effect of Walking on Labor and Delivery