WHO. (1996). Obstructed labour module. education material for teachers of midwifery. WHO.
Citazione stile Chigago Style (17a edizione)WHO. Obstructed Labour Module. Education Material for Teachers of Midwifery. WHO, 1996.
Citatione MLA (9a ed.)WHO. Obstructed Labour Module. Education Material for Teachers of Midwifery. WHO, 1996.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.