Certo, S. C. (1994). Supervision: Quality and diversity through leadership. Irwin.
Chicago Style aipamenaCerto, Samuel C. Supervision: Quality and Diversity Through Leadership. Burr Ridge, Ill: Irwin, 1994.
MLA aipamenaCerto, Samuel C. Supervision: Quality and Diversity Through Leadership. Irwin, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.