World Health Organization. (2011). Atlas of headache disorders and resources in the world 2011. World Health Organization.
Chicago Style (17. basım) AtıfWorld Health Organization. Atlas of Headache Disorders and Resources in the World 2011. Geneva, Switzerland: World Health Organization, 2011.
MLA (8th ed.) AtıfWorld Health Organization. Atlas of Headache Disorders and Resources in the World 2011. World Health Organization, 2011.
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