World Health Organization. (2011). Atlas of headache disorders and resources in the world 2011. World Health Organization.
芝加哥风格引文World Health Organization. Atlas of Headache Disorders and Resources in the World 2011. Geneva, Switzerland: World Health Organization, 2011.
MLA引文World Health Organization. Atlas of Headache Disorders and Resources in the World 2011. World Health Organization, 2011.
警告：这些引文格式不一定是100％准确.