APA (7 वां संस्करण) प्रशस्ति पत्र

Stafford, B. M. (2007). Echo objects: The cognitive work of images. Univ. of Chicago Press.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Stafford, Barbara Maria. Echo Objects: The Cognitive Work of Images. Chicago, Ill. [u.a.]: Univ. of Chicago Press, 2007.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Stafford, Barbara Maria. Echo Objects: The Cognitive Work of Images. Univ. of Chicago Press, 2007.