Barbour, I. G. Technology, environment, and human values. Praeger.
Chicago-čujuhus (17. p.)Barbour, Ian G. Technology, Environment, and Human Values. London: Praeger.
MLA-čujuhus (9. p.)Barbour, Ian G. Technology, Environment, and Human Values. Praeger.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.