Jack, W. (1999). Principles of health economics for developing countries. WBI Development Studies.
Chicago Style aipamenaJack, William. Principles of Health Economics for Developing Countries. Washington: WBI Development Studies, 1999.
MLA aipamenaJack, William. Principles of Health Economics for Developing Countries. WBI Development Studies, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.