Cita APA (7a ed.)

Echenique, M. (1969). Urban Systems: Towards an Explorative Model.

Cita Chicago Style (17a ed.)

Echenique, Marcial. Urban Systems: Towards an Explorative Model. England, London, 1969.

Cita MLA (9a ed.)

Echenique, Marcial. Urban Systems: Towards an Explorative Model. 1969.