Lua APA (7ú heag.)
Langdell, C. C., & Langdell, T. (2010). Coping with vision loss: Understanding the psychological, social, and spiritual effects. Praeger.
Lua i Stíl Chicago (17ú heag.)
Langdell, Cheri Colby, agus Tim Langdell. Coping with Vision Loss: Understanding the Psychological, Social, and Spiritual Effects. Santa Barbara, Calif.: Praeger, 2010.
Lua MLA (9ú heag.)
Langdell, Cheri Colby, agus Tim Langdell. Coping with Vision Loss: Understanding the Psychological, Social, and Spiritual Effects. Praeger, 2010.
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