(1990). International research centers directory. Gale Research Co..
Chicago-čujuhus (17. p.)International Research Centers Directory. Detroit, Mich.: Gale Research Co., 1990.
MLA-čujuhus (9. p.)International Research Centers Directory. Gale Research Co., 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.