Cita APA

Bettencourt, L. M. A., Lobo, J., Helbing, D., Kühnert, C., & West, G. B. (2007). Growth, innovation, scaling, and the pace of life in cities. National Academy of Sciences.

Chicago Style Citation

Bettencourt, Luís M. A., José Lobo, Dirk Helbing, Christian Kühnert, i Geoffrey B. West. Growth, Innovation, Scaling, and the Pace of Life in Cities. National Academy of Sciences, 2007.

Cita MLA

Bettencourt, Luís M. A., et al. Growth, Innovation, Scaling, and the Pace of Life in Cities. National Academy of Sciences, 2007.