Watkins, F. C. y. W. B. D. (1982). Practical english handbook (6.). Houghton Mifflin.
Chicago-čujuhus (17. p.)Watkins, Floyd C. y William B. Dillingham. Practical English Handbook. 6. Boston, Estados Unidos: Houghton Mifflin, 1982.
MLA-čujuhus (9. p.)Watkins, Floyd C. y William B. Dillingham. Practical English Handbook. 6. Houghton Mifflin, 1982.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.