Laczniak, G. R. and Murphy, P. E. 1993. Ethical Marketing Decisions. Needham Hights: Allyn & Bawn. U.S. focus, general introduction covering topics such as market research, product safety, pricing, advertising, and selling.

Schlegelmilch, B. 1998. Marketing Ethics. London: International Thomson Business Press. International focus (subtitle is 'An International Perspective'), and very broad coverage with part one introducing business ethics in general as well as marketing ethics in particular, part two presenting cases, part three is devoted to readings on a variety of topics (including a discussion of bribery and extortion in international business), while part four details business ethics resources.

Note: insofar as the focus is on advertising, there is a useful source for the ethical analysis of images in semiotic analysis (e.g. Williams, J. 1978. Decoding Advertisements. London: Marion Boyars).