Ross,David. (2005). Advocacy.
Chicago-čujuhus (17. p.)Ross,David. Advocacy. Australia, 2005.
MLA-čujuhus (9. p.)Ross,David. Advocacy. 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.
Ross,David. (2005). Advocacy.
Chicago-čujuhus (17. p.)Ross,David. Advocacy. Australia, 2005.
MLA-čujuhus (9. p.)Ross,David. Advocacy. 2005.