(1989). The world book encyclopedia of science: The heavens. World Book,Inc..
Chicago-čujuhus (17. p.)The World Book Encyclopedia of Science: The Heavens. Chicago: World Book,Inc., 1989.
MLA-čujuhus (9. p.)The World Book Encyclopedia of Science: The Heavens. World Book,Inc., 1989.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.