Shefsky, L. E. (1994). Entrepreneurs are made not born. McGraw-Hill.
Cita Chicago (17th ed.)Shefsky, Lloyd E. Entrepreneurs Are Made Not Born. New York: McGraw-Hill, 1994.
Cita MLA (9th ed.)Shefsky, Lloyd E. Entrepreneurs Are Made Not Born. McGraw-Hill, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.