James, G. A., & Armstrong, J. D. (1976). Handbook on mobility maps. Blind Mobility Research Unit, Dept. of Psychology, University of Nottingham.
Lua i Stíl Chicago (17ú heag.)James, G. A., agus J. D. Armstrong. Handbook on Mobility Maps. Nottingham, Eng.: Blind Mobility Research Unit, Dept. of Psychology, University of Nottingham, 1976.
Lua MLA (8ú heag.)James, G. A., agus J. D. Armstrong. Handbook on Mobility Maps. Blind Mobility Research Unit, Dept. of Psychology, University of Nottingham, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.