Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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