Langs, R. (1999). Psychotherapy and science. SAGE Publications.
Chicago-čujuhus (17. p.)Langs, Robert. Psychotherapy and Science. London ; Thousand Oaks, Calif.: SAGE Publications, 1999.
MLA-čujuhus (9. p.)Langs, Robert. Psychotherapy and Science. SAGE Publications, 1999.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.