North Klaus. (1997). Environmental business management: An Introduction (2nd (revised).). International Labour Office.
Chicago-čujuhus (17. p.)North Klaus. Environmental Business Management: An Introduction. 2nd (revised). Geneva: International Labour Office, 1997.
MLA-čujuhus (9. p.)North Klaus. Environmental Business Management: An Introduction. 2nd (revised). International Labour Office, 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.