International Conference on Automated People Movers Phoenix, Ariz, Leder, W. H., & Sproule, W. J. (2013). Automated people movers and transit systems 2013: Half a century of automated transit -- past, present, and future : proceedings of the Fourteenth International Conference, April 21-24, 2013, Phoenix, Arizona. American Society of Civil Engineers.

International Conference on Automated People Movers Phoenix, Ariz, William H. Leder, and William J. Sproule. Automated People Movers and Transit Systems 2013: Half a Century of Automated Transit -- Past, Present, and Future : Proceedings of the Fourteenth International Conference, April 21-24, 2013, Phoenix, Arizona. Reston, Virginia: American Society of Civil Engineers, 2013.

International Conference on Automated People Movers Phoenix, Ariz, et al. Automated People Movers and Transit Systems 2013: Half a Century of Automated Transit -- Past, Present, and Future : Proceedings of the Fourteenth International Conference, April 21-24, 2013, Phoenix, Arizona. American Society of Civil Engineers, 2013.