Cita APA (7a ed.)

Downs, R. M. (1970). The cognitive structure of an urban shopping center. [s.n.].

Cita Chicago Style (17a ed.)

Downs, Roger M. The Cognitive Structure of an Urban Shopping Center. [S.l.]: [s.n.], 1970.

Cita MLA (9a ed.)

Downs, Roger M. The Cognitive Structure of an Urban Shopping Center. [s.n.], 1970.