@book{PerlsHefferlineGoddman, author = {Perls, Fritz S. and Hefferline, Ralph F. and Goddman, Paul}, title = {Gestalttherapie - Grundlagen, M{\"u}nchen (dtv), 1991, 270 pp.}, language = {de} } @book{PerlsHefferlineGoddman, author = {Perls, Fritz S. and Hefferline, Ralph F. and Goddman, Paul}, title = {Gestalttherapie - Praxis, M{\"u}nchen (dtv), 1991, 248 pp.}, language = {de} }