Pettigrew, A. (2011). Scholarship with Impact.
Chicago-čujuhus (17. p.)Pettigrew, A. Scholarship with Impact. 2011.
MLA-čujuhus (9. p.)Pettigrew, A. Scholarship with Impact. 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.