Gale Research Company. (1987). Research Centers directory. Gale.
Chicago-čujuhus (17. p.)Gale Research Company. Research Centers Directory. Detroit, Mich.: Gale, 1987.
MLA-čujuhus (9. p.)Gale Research Company. Research Centers Directory. Gale, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.