Quirk, J. P., & Fort, R. D. (1997). Pay dirt: The business of professional team sports (Updated pbk. ed.). Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Quirk, James P., agus Rodney D. Fort. Pay Dirt: The Business of Professional Team Sports. Updated pbk. ed. Princeton, N.J.: Princeton University Press, 1997.
Lua MLA (9ú heag.)Quirk, James P., agus Rodney D. Fort. Pay Dirt: The Business of Professional Team Sports. Updated pbk. ed. Princeton University Press, 1997.
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