Certo, S. C. (2000). Supervision: Concepts and skill building (3rd ed.). Irwin.
Chicago-čujuhus (17. p.)Certo, Samuel C. Supervision: Concepts and Skill Building. 3rd ed. Illinois: Irwin, 2000.
MLA-čujuhus (9. p.)Certo, Samuel C. Supervision: Concepts and Skill Building. 3rd ed. Irwin, 2000.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.