Certo, S. C. (1994). Supervision: Quality and diversity through leadership. Irwin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCerto, Samuel C. Supervision: Quality and Diversity Through Leadership. Burr Ridge, Ill: Irwin, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCerto, Samuel C. Supervision: Quality and Diversity Through Leadership. Irwin, 1994.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.