WHO. (1996). Obstructed labour module. education material for teachers of midwifery. WHO.
Chicago Style (17. basım) AtıfWHO. Obstructed Labour Module. Education Material for Teachers of Midwifery. WHO, 1996.
MLA (9th ed.) AtıfWHO. Obstructed Labour Module. Education Material for Teachers of Midwifery. WHO, 1996.
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