World Health Organization. Essential elements of obstetric care at first referral level.
Citazione stile Chigago Style (17a edizione)World Health Organization. Essential Elements of Obstetric Care at First Referral Level.
Citatione MLA (8a ed.)World Health Organization. Essential Elements of Obstetric Care at First Referral Level.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.