Erlandson, R. F. (2008). Universal and accessible design for products, services, and processes. CRC Press/Taylor & Francis Group.
Lua i Stíl Chicago (17ú heag.)Erlandson, Robert F. Universal and Accessible Design for Products, Services, and Processes. Boca Raton, Fla: CRC Press/Taylor & Francis Group, 2008.
Lua MLA (8ú heag.)Erlandson, Robert F. Universal and Accessible Design for Products, Services, and Processes. CRC Press/Taylor & Francis Group, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.