World Health Organization. (2011). Atlas of headache disorders and resources in the world 2011. World Health Organization.
Цитирование в стиле Чикаго (17-е изд.)World Health Organization. Atlas of Headache Disorders and Resources in the World 2011. Geneva, Switzerland: World Health Organization, 2011.
Цитирование MLA (8-е изд.)World Health Organization. Atlas of Headache Disorders and Resources in the World 2011. World Health Organization, 2011.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.