1. Bacon, D. (1989), “Business′s Role in War on Drugs”, Nation′s Business, January, p.5.
2. Campbell, B.A. and Goodwell, R.F. (1990), “A lcohol and Drugs in the Workplace: Major Problem or Myth?”, Business Quarterly, Vol. 55 No. 2, Autumn, pp. 60‐63.
3. Colosi, M.L. (1989), “The Labor Relations of Substance Abuse”, Labor Law Journal, October, pp. 642‐53.
4. Coefficient alpha and the internal structure of tests
5. Denenberg, T.S. and Denenberg, D.V. (1987), “Employee Drug Testing and the Arbitrator: What Are the Issues?”, The Arbitration Journal, Vol. 42 No. 2, June, pp. 20, 42.