United States. Federal Transit Administration, Transit Cooperative Research Program, National Research Council (U.S.). Transportation Research Board, Vlasak, D. L., & Williams, J. (2006). Synthesis of information related to transit problems. Transportation Research Board, National Research Council.

United States. Federal Transit Administration, Transit Cooperative Research Program, National Research Council (U.S.). Transportation Research Board, Donna L. Vlasak, and Jon Williams. Synthesis of Information Related to Transit Problems. [Washington, D.C.]: Transportation Research Board, National Research Council, 2006.

United States. Federal Transit Administration, et al. Synthesis of Information Related to Transit Problems. Transportation Research Board, National Research Council, 2006.