Johnson, M. 1. S. 2. (1997). Outsourcing: In brief. Butterworth Heinemann.
Chicago Style aipamenaJohnson, Mike 1947 Sept. 24-. Outsourcing: In Brief. Oxford: Butterworth Heinemann, 1997.
MLA aipamenaJohnson, Mike 1947 Sept. 24-. Outsourcing: In Brief. Butterworth Heinemann, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.