National Association of Secondary School Principals (U.S.). (2006). Principal's research review. National Association of Secondary School Principals.
Chicago-čujuhus (17. p.)National Association of Secondary School Principals (U.S.). Principal's Research Review. Reston, VA: National Association of Secondary School Principals, 2006.
MLA-čujuhus (9. p.)National Association of Secondary School Principals (U.S.). Principal's Research Review. National Association of Secondary School Principals, 2006.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.