(1968). Environment far man: The next fifty years. Indiana University.
Chicago-čujuhus (17. p.)Environment Far Man: The Next Fifty Years. London: Indiana University, 1968.
MLA-čujuhus (9. p.)Environment Far Man: The Next Fifty Years. Indiana University, 1968.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.