Marcus, B. W. (1992). Competing for clients in the 90's. Mc Graw Hill.
Chicago Style aipamenaMarcus, Bruce W. Competing for Clients in the 90's. London: Mc Graw Hill, 1992.
MLA aipamenaMarcus, Bruce W. Competing for Clients in the 90's. Mc Graw Hill, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.