Cita APA (7a ed.)

World Health Organization. (1990). Cancer pain relief and palliative care. World Health Organization.

Cita Chicago Style (17a ed.)

World Health Organization. Cancer Pain Relief and Palliative Care. Genebra: World Health Organization, 1990.

Cita MLA (8a ed.)

World Health Organization. Cancer Pain Relief and Palliative Care. World Health Organization, 1990.