Palmer, J. A. (2001). Fifty key thinkers on the environment. Routledge.
Chicago-čujuhus (17. p.)Palmer, Joy A. Fifty Key Thinkers on the Environment. London: Routledge, 2001.
MLA-čujuhus (9. p.)Palmer, Joy A. Fifty Key Thinkers on the Environment. Routledge, 2001.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.