APA (7 वां संस्करण) प्रशस्ति पत्र

ebrary, Inc, & Watkinson, S. (2009). Issues in ophthalmic practice: Current and future challenges. M&K Update Ltd..

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

ebrary, Inc, और Sue Watkinson. Issues in Ophthalmic Practice: Current and Future Challenges. Cumbria [England]: M&K Update Ltd., 2009.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

ebrary, Inc, और Sue Watkinson. Issues in Ophthalmic Practice: Current and Future Challenges. M&K Update Ltd., 2009.