ENVIRONMENTAL & BELL, P. A. (1996). Environmental psychology.-- ed.4. Harcourt Brace College.
Lua i Stíl Chicago (17ú heag.)ENVIRONMENTAL agus Paul A. BELL. Environmental Psychology.-- Ed.4. Philadelphia: Harcourt Brace College, 1996.
Lua MLA (9ú heag.)ENVIRONMENTAL agus Paul A. BELL. Environmental Psychology.-- Ed.4. Harcourt Brace College, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.