Smith, R. J., Butler, B. R., & Le Bold, W. K. (1983). Engineering as a career. New York : McGraw-Hill.
Chicago-čujuhus (17. p.)Smith, Ralph J., Blaine R. Butler, juo William K. Le Bold. Engineering as a Career. New York : McGraw-Hill, 1983.
MLA-čujuhus (9. p.)Smith, Ralph J., et al. Engineering as a Career. New York : McGraw-Hill, 1983.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.