National Association of Elementary School Principals (U.S.). (1980). Principal. National Association of Elementary School Principals.
Chicago-čujuhus (17. p.)National Association of Elementary School Principals (U.S.). Principal. Arlington, Va.: National Association of Elementary School Principals, 1980.
MLA-čujuhus (9. p.)National Association of Elementary School Principals (U.S.). Principal. National Association of Elementary School Principals, 1980.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.