Παραπομπή APA

Nijkamp, P., & Perrels, A. (1994). Sustainable cities in Europe: A comparative analysis of urban energy-environmental policies. London: Earthscan.

Παραπομπή Chicago Style

Nijkamp, Peter, and Adriaan Perrels. Sustainable Cities in Europe: A Comparative Analysis of Urban Energy-environmental Policies. London: Earthscan, 1994.

Παραπομπή MLA

Nijkamp, Peter, and Adriaan Perrels. Sustainable Cities in Europe: A Comparative Analysis of Urban Energy-environmental Policies. London: Earthscan, 1994.

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