Παραπομπή APA

(1988). Cities: Statistical administrative and graphical information on the major urban areas of the world. Barcelona: Institut d'Estudis Metropolitans de Barcelona.

Παραπομπή Chicago Style

Cities: Statistical Administrative and Graphical Information On the Major Urban Areas of the World. Barcelona: Institut d'Estudis Metropolitans de Barcelona, 1988.

Παραπομπή MLA

Cities: Statistical Administrative and Graphical Information On the Major Urban Areas of the World. Barcelona: Institut d'Estudis Metropolitans de Barcelona, 1988.

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