WHO. (1996). Obstructed labour module. education material for teachers of midwifery. WHO.
Chicago Style (17th ed.) CitationWHO. Obstructed Labour Module. Education Material for Teachers of Midwifery. WHO, 1996.
MLA引文WHO. Obstructed Labour Module. Education Material for Teachers of Midwifery. WHO, 1996.
警告：這些引文格式不一定是100％准確.