APA-čujuhus (7. p.)
Perls, F. S. (1976). The gestalt Approach & eye witness to therapy.
Chicago-čujuhus (17. p.)
Perls, Frederick S. The Gestalt Approach & Eye Witness to Therapy. 1976.
MLA-čujuhus (9. p.)
Perls, Frederick S. The Gestalt Approach & Eye Witness to Therapy. 1976.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.