(1979). Introduction to natural science. McGraw-Hill.
Chicago-čujuhus (17. p.)Introduction to Natural Science. New York: McGraw-Hill, 1979.
MLA-čujuhus (9. p.)Introduction to Natural Science. McGraw-Hill, 1979.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.