World Health Organization. (1987). Guidelines for the toxicological and clinical assessment and post-registration surveillance of steroidal contraceptive drugs (First edition.). World Health Organization.
Chicago-viite (17. p.)World Health Organization. Guidelines for the Toxicological and Clinical Assessment and Post-registration Surveillance of Steroidal Contraceptive Drugs. First edition. Geneva: World Health Organization, 1987.
MLA-viite (8. p.)World Health Organization. Guidelines for the Toxicological and Clinical Assessment and Post-registration Surveillance of Steroidal Contraceptive Drugs. First edition. World Health Organization, 1987.
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