APA-čujuhus (7. p.)
HELLER, H., ET AL, & SPOONER, F. (1991). CLASSIC ARTICLES: A REFLECTION INTO THE FIELD OF MENTAL RETARDATION.
Chicago-čujuhus (17. p.)
HELLER, H.W, ET AL, juo F. SPOONER. CLASSIC ARTICLES: A REFLECTION INTO THE FIELD OF MENTAL RETARDATION. 1991.
MLA-čujuhus (9. p.)
HELLER, H.W, et al. CLASSIC ARTICLES: A REFLECTION INTO THE FIELD OF MENTAL RETARDATION. 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.