Connor, D., & Davidson, J. P. (1990). Marketing your consulting and professional services (2nd ed.). Wiley.
Lua i Stíl Chicago (17ú heag.)Connor, Dick, agus Jeffrey P. Davidson. Marketing Your Consulting and Professional Services. 2nd ed. New York: Wiley, 1990.
Lua MLA (9ú heag.)Connor, Dick, agus Jeffrey P. Davidson. Marketing Your Consulting and Professional Services. 2nd ed. Wiley, 1990.
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