Siegel, Ronald D. (Nombre personal)

Back sense, c2001: CIP t.p. (Dr. Ronald D. Siegel)

ProQuest's digital dissertations database via WWW, April 11, 2005 (Siegel, Ronald Douglas, PsyD, Rutgers, 1983)

Sitting together, 2014: ECIP t.p. (Ronald D. Siegel)

Institute for Mediation and Psychotherapy (Cambridge, Massachusetts), Board of Directors; viewed Oct. 25, 2013 (Ronald D. Siegel, PsyD; assistant clinical professor of psychology at Harvard Medical School, where he has taught for over 25 years; co-author of Back sense)