EICHER, D. L. (1980). History of the earth. Prentice-Hall.
Chicago-čujuhus (17. p.)EICHER, Don L. History of the Earth. Englewood Cliffs, N.J.: Prentice-Hall, 1980.
MLA-čujuhus (9. p.)EICHER, Don L. History of the Earth. Prentice-Hall, 1980.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.