Ulrich, K. T. (2020). Product Design and Development (7th.). McGraw Hill.
Chicago-čujuhus (17. p.)Ulrich, Karl T. Product Design and Development. 7th. McGraw Hill, 2020.
MLA-čujuhus (9. p.)Ulrich, Karl T. Product Design and Development. 7th. McGraw Hill, 2020.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.