(1997). Springer CD-ROM. Catalogue 97/98 of all books, journals and electronic media.
Chicago-čujuhus (17. p.)Springer CD-ROM. Catalogue 97/98 of All Books, Journals and Electronic Media. 1997.
MLA-čujuhus (9. p.)Springer CD-ROM. Catalogue 97/98 of All Books, Journals and Electronic Media. 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.