APA-čujuhus (7. p.)
Westling David L. (1986). Introduction to mental retardation. Prentice-Hall.
Chicago-čujuhus (17. p.)
Westling David L. Introduction to Mental Retardation. New Jersey: Prentice-Hall, 1986.
MLA-čujuhus (9. p.)
Westling David L. Introduction to Mental Retardation. Prentice-Hall, 1986.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.