Costello, E. (2006). Getting started in signing. Living Language.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCostello, Elaine. Getting Started in Signing. New York: Living Language, 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCostello, Elaine. Getting Started in Signing. Living Language, 2006.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.