Berelson, B., & Lieberson, J. (1979). Governmental intervention on fertility: What is ethical? Population Council.
Chicago Style aipamenaBerelson, Bernard, and Jonathan Lieberson. Governmental Intervention on Fertility: What Is Ethical? New York: Population Council, 1979.
MLA aipamenaBerelson, Bernard, and Jonathan Lieberson. Governmental Intervention on Fertility: What Is Ethical? Population Council, 1979.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.