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Gregory, J. R., Wiechmann, Jack G. (1991). Marketing corporate image: the company as your number one product. Lincolnwood, Ill., USA: NTC Business Books.

Gregory, J. R., Wiechmann, Jack G. (1997). Leveraging the corporate brand. Lincolnwood, Ill., USA: NTC Business Books.

Gregory, J. R. (1997). ROI: Calculating Advertising’s Impact on Stock Price. Corporate Reputation Review, Volume 1 (Numbers 1 and 2), 5.

Gregory, J. R. (1997). The impact of advertising on stock performance. Retrieved from New York, NY: Business Week.

Gregory, J. R., Wiechmann, J. G. (1997). Leveraging the corporate brand. Lincolnwood, Ill., USA: NTC Business Books.

Gregory, J. (1998). The impact of advertising on brand momentum. Retrieved from New York: Business Week.