APA (7th ed.) Zitazioa

ebrary, Inc, Walters, D., & Rainbird, M. (2004). The value chain. Emerald Group Pub..

Chicago Style (17th ed.) Zitazioa

ebrary, Inc, David Walters, eta Mark Rainbird. The Value Chain. [Bradford, England]: Emerald Group Pub., 2004.

MLA (9th ed.) Zitazioa

ebrary, Inc, et al. The Value Chain. Emerald Group Pub., 2004.