Cramer, R. L. (1978). Spelling: Words and skills. Scott, Foresman.
Chicago-čujuhus (17. p.)Cramer, Ronald L. Spelling: Words and Skills. Scott, Foresman, 1978.
MLA-čujuhus (9. p.)Cramer, Ronald L. Spelling: Words and Skills. Scott, Foresman, 1978.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.