APA (7th ed.) Citation
Beckmann, M. J., & Puu, T. (1985). Spatial economics: Density, potential, and flow. North-Holland.
Chicago Style (17th ed.) Citation
Beckmann, Martin J., and Tönu Puu. Spatial Economics: Density, Potential, and Flow. Amsterdam: North-Holland, 1985.
MLA (9th ed.) Citation
Beckmann, Martin J., and Tönu Puu. Spatial Economics: Density, Potential, and Flow. North-Holland, 1985.
Warning: These citations may not always be 100% accurate.