United States. Congress. Office of Technology Assessment. (1987). Technologies to Maintain Biological Diversity. U.S. Government Printing Office.
Chicago-čujuhus (17. p.)United States. Congress. Office of Technology Assessment. Technologies to Maintain Biological Diversity. Washington, D.C.: U.S. Government Printing Office, 1987.
MLA-čujuhus (9. p.)United States. Congress. Office of Technology Assessment. Technologies to Maintain Biological Diversity. U.S. Government Printing Office, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.