APA (7th ed.) Zitazioa

ebrary, Inc. (2004). A guide to competitive vouchers in health. World Bank.

Chicago Style (17th ed.) Zitazioa

ebrary, Inc. A Guide to Competitive Vouchers in Health. Washington, DC: World Bank, 2004.

MLA (9th ed.) Zitazioa

ebrary, Inc. A Guide to Competitive Vouchers in Health. World Bank, 2004.