Ostring, P. (2008). Profit focussed supplier management. Prentice Hall of India.
Chicago Style aipamenaOstring, Pirkko. Profit Focussed Supplier Management. New Delhi: Prentice Hall of India, 2008.
MLA aipamenaOstring, Pirkko. Profit Focussed Supplier Management. Prentice Hall of India, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.