WHO. (1996). Obstructed labour module. education material for teachers of midwifery. WHO.
Chicago-referens (17:e uppl.)WHO. Obstructed Labour Module. Education Material for Teachers of Midwifery. WHO, 1996.
MLA-referens (9:e uppl.)WHO. Obstructed Labour Module. Education Material for Teachers of Midwifery. WHO, 1996.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.