Pethig, R. (1996). Valuing the environment: Methodological and measurement issues. Kluwer Academic Publishers.
Chicago-čujuhus (17. p.)Pethig, Rudiger. Valuing the Environment: Methodological and Measurement Issues. Dordrecht: Kluwer Academic Publishers, 1996.
MLA-čujuhus (9. p.)Pethig, Rudiger. Valuing the Environment: Methodological and Measurement Issues. Kluwer Academic Publishers, 1996.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.