APA (7 वां संस्करण) प्रशस्ति पत्र

ebrary, Inc, & Opelt, A. (2013). Agile contracts: Creating and managing successful projects with Scrum. Wiley.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

ebrary, Inc, और Andreas Opelt. Agile Contracts: Creating and Managing Successful Projects with Scrum. Hoboken, N.J.: Wiley, 2013.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

ebrary, Inc, और Andreas Opelt. Agile Contracts: Creating and Managing Successful Projects with Scrum. Wiley, 2013.