@misc{GlassKliegl2009,
  author    = {Gene V. Glass and Reinhold Kliegl},
  title     = {An apology for research integration in the study of psychotherapy},
  institution = {Department Psychologie},
  series    = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  number    = {paper 145},
  type      = {postprint},
  year        = {2009},
}