Costello patrick j.m. (2005). Action Reserch. Continuum Publ.
Chicago-čujuhus (17. p.)Costello patrick j.m. Action Reserch. London: Continuum Publ, 2005.
MLA-čujuhus (9. p.)Costello patrick j.m. Action Reserch. Continuum Publ, 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.