Cita APA (7th ed.)

World Health Organization. (2011). Atlas of headache disorders and resources in the world 2011. World Health Organization.

Cita Chicago (17th ed.)

World Health Organization. Atlas of Headache Disorders and Resources in the World 2011. Geneva, Switzerland: World Health Organization, 2011.

Cita MLA (8th ed.)

World Health Organization. Atlas of Headache Disorders and Resources in the World 2011. World Health Organization, 2011.