Day Joh A. (1971). Dimension of the environmental crisis. John Wiley.
Chicago-čujuhus (17. p.)Day Joh A. Dimension of the Environmental Crisis. New York: John Wiley, 1971.
MLA-čujuhus (9. p.)Day Joh A. Dimension of the Environmental Crisis. John Wiley, 1971.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.