Valenzuela, A. (1980). A resourcebook on guidance and counseling for voluntary surgical sterilization. Population Center Foundation.
Chicago Style aipamenaValenzuela, Amanda. A Resourcebook on Guidance and Counseling for Voluntary Surgical Sterilization. Manila: Population Center Foundation, 1980.
MLA aipamenaValenzuela, Amanda. A Resourcebook on Guidance and Counseling for Voluntary Surgical Sterilization. Population Center Foundation, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.