World Health Organization. Scientific Group. (1997). Medical methods for termination of pregnancy: Report of a WHO Scientific Group. World Health Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Health Organization. Scientific Group. Medical Methods for Termination of Pregnancy: Report of a WHO Scientific Group. Geneva: World Health Organization, 1997.
Παραπομπή σε μορφή MLA (8th εκδ.)World Health Organization. Scientific Group. Medical Methods for Termination of Pregnancy: Report of a WHO Scientific Group. World Health Organization, 1997.
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