as co-editor with Lawrence Becker

  • Encyclopedia of Ethics, Garland Publishing (New York) and St. James Press (London), 1992, (1st ed., 2 volumes), Routledge (New York), 2001, (2nd ed., 3 volumes)
  • History of Western Ethics, Garland Publishing (New York), 1992, (1st ed.), Routledge (New York), 2003, (2nd ed.)