Cita APA (7a ed.)

Callingworth, J. B., & Orr, S. C. (1969). Regional and urban studies: A social science approach. Sage publications.

Cita Chicago Style (17a ed.)

Callingworth, John Barry, y S. C. Orr. Regional and Urban Studies: A Social Science Approach. Beverly Hills: Sage publications, 1969.

Cita MLA (9a ed.)

Callingworth, John Barry, y S. C. Orr. Regional and Urban Studies: A Social Science Approach. Sage publications, 1969.