Walker, H. F. (2008). The certified quality inspector handbook. ASQ Quality Press.
Chicago-čujuhus (17. p.)Walker, H. Fred. The Certified Quality Inspector Handbook. Milwaukee, Wisconsin: ASQ Quality Press, 2008.
MLA-čujuhus (9. p.)Walker, H. Fred. The Certified Quality Inspector Handbook. ASQ Quality Press, 2008.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.