Spellerberg, I. F. (1992). Evaluation and assessment for conservation: Ecological guidelines for determininf priorities for nature conservation. Chapman and Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpellerberg, Ian F. Evaluation and Assessment for Conservation: Ecological Guidelines for Determininf Priorities for Nature Conservation. London: Chapman and Hall, 1992.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSpellerberg, Ian F. Evaluation and Assessment for Conservation: Ecological Guidelines for Determininf Priorities for Nature Conservation. Chapman and Hall, 1992.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.