Certo, S. C. (2000). Supervision: Concepts and skill building (3rd ed.). Irwin.
Citazione stile Chigago Style (17a edizione)Certo, Samuel C. Supervision: Concepts and Skill Building. 3rd ed. Illinois: Irwin, 2000.
Citatione MLA (9a ed.)Certo, Samuel C. Supervision: Concepts and Skill Building. 3rd ed. Irwin, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.