BRADFORD, D. L., & COHEN, A. R. (1984). Managing for excelence: The guide to developing in high performance. John Wiley.

BRADFORD, David L., and Allan R. COHEN. Managing for Excelence: The Guide to Developing in High Performance. New York: John Wiley, 1984.

BRADFORD, David L., and Allan R. COHEN. Managing for Excelence: The Guide to Developing in High Performance. John Wiley, 1984.