LANGE, O. General geology. The Foreign Languages Publishing House.
Chicago-čujuhus (17. p.)LANGE, O. General Geology. Mascow: The Foreign Languages Publishing House.
MLA-čujuhus (9. p.)LANGE, O. General Geology. The Foreign Languages Publishing House.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.