World Health Organization, United Nations Development Programme, & Reid, E. (1998). Cancer pain relief and palliative care in children. World Health Organization.
Chicago Style aipamenaWorld Health Organization, United Nations Development Programme, and Elizabeth Reid. Cancer Pain Relief and Palliative Care in Children. Geneva: World Health Organization, 1998.
MLA aipamenaWorld Health Organization, et al. Cancer Pain Relief and Palliative Care in Children. World Health Organization, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.