APA aipamena

Stephenson, S. (1999). Approaches to liberalizing services. World Bank.

Chicago Style aipamena

Stephenson, Sherry. Approaches to Liberalizing Services. Washington, DC: World Bank, 1999.

MLA aipamena

Stephenson, Sherry. Approaches to Liberalizing Services. World Bank, 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.