Hanson, L. A., Bergstrom, S., & Rosero Bixby, L. (1994). Infant mortality and birth rates.
Chicago Style aipamenaHanson, Lars Ake, Staffan Bergstrom, y Luis Rosero Bixby. Infant Mortality and Birth Rates. 1994.
MLA aipamenaHanson, Lars Ake, Staffan Bergstrom, y Luis Rosero Bixby. Infant Mortality and Birth Rates. 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.