1. Bell, A.: 1981, ?The PSE: A Decade of Controversy?, Security Management March, pp. 63?74.
2. Brickman, Glen: 1976, ?Voice Analysis?, Journal of Advertising Research June, p. 44.
3. Cavanagh, Gerald and McGovern, Arthur: 1988, Ethical Dilemmas in the Modern Corporation (Prentice Hall), p. 5.
4. Cheavening, Richard: 1986, ?Can Free Enterprise Survive Ethical Schizophrenia??, Business Horizons March?April, p. 5.
5. Frankel, Mark S.: 1989, ?Professional Codes: Why, How, and with What Impact?, Journal of Business Ethics 8, pp. 109?15.