APA (7th ed.) Zitazioa
Bratton, S. (1992). Six billion and more: Human population regulation and Christian ethics. Westminster/J. Knox Press.
Chicago Style (17th ed.) Zitazioa
Bratton, Susan. Six Billion and More: Human Population Regulation and Christian Ethics. Louisville, Ky.: Westminster/J. Knox Press, 1992.
MLA (9th ed.) Zitazioa
Bratton, Susan. Six Billion and More: Human Population Regulation and Christian Ethics. Westminster/J. Knox Press, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.