Cita APA (7th ed.)
ebrary, Inc, Walters, D., & Rainbird, M. (2004). The value chain. Emerald Group Pub..
Cita Chicago (17th ed.)
ebrary, Inc, David Walters, i Mark Rainbird. The Value Chain. [Bradford, England]: Emerald Group Pub., 2004.
Cita MLA (9th ed.)
ebrary, Inc, et al. The Value Chain. Emerald Group Pub., 2004.
Atenció: Aquestes cites poden no estar 100% correctes.