ENVIRONMENTAL & BELL, P. A. (1996). Environmental psychology.-- ed.4. Harcourt Brace College.
Chicago Style aipamenaENVIRONMENTAL and Paul A. BELL. Environmental Psychology.-- Ed.4. Philadelphia: Harcourt Brace College, 1996.
MLA aipamenaENVIRONMENTAL and Paul A. BELL. Environmental Psychology.-- Ed.4. Harcourt Brace College, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.