WILLINGHAM RON. (2005). INTEGRITY SERVICES. FREE PRESS.
Chicago-čujuhus (17. p.)WILLINGHAM RON. INTEGRITY SERVICES. NEW YORK: FREE PRESS, 2005.
MLA-čujuhus (9. p.)WILLINGHAM RON. INTEGRITY SERVICES. FREE PRESS, 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.