Tyson, K. W. (1997). Competition in the 21st century. St. Lucie Press.
Citazione stile Chigago Style (17a edizione)Tyson, Kirk W.M. Competition in the 21st Century. Delray Beach, FL: St. Lucie Press, 1997.
Citatione MLA (9a ed.)Tyson, Kirk W.M. Competition in the 21st Century. St. Lucie Press, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.