APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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