APA-čujuhus (7. p.)
Spier, R. Ethics, Tools, and the Engineer. CRC Press.
Chicago-čujuhus (17. p.)
Spier, Raymond. Ethics, Tools, and the Engineer. Boca Ratón, EUA: CRC Press.
MLA-čujuhus (9. p.)
Spier, Raymond. Ethics, Tools, and the Engineer. CRC Press.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.