WHO. (1996). Obstructed labour module. education material for teachers of midwifery. WHO.
Čikaški stil citiranja (17. izdanje)WHO. Obstructed Labour Module. Education Material for Teachers of Midwifery. WHO, 1996.
MLA način citiranja (9. izdanje)WHO. Obstructed Labour Module. Education Material for Teachers of Midwifery. WHO, 1996.
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