Aspen Systems Corporation. (2015). Techniques in Orthopaedics. Aspen Systems Corporation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAspen Systems Corporation. Techniques in Orthopaedics. Rockville, Md: Aspen Systems Corporation, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAspen Systems Corporation. Techniques in Orthopaedics. Aspen Systems Corporation, 2015.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.