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.
Chicago-referens (17:e uppl.)United States. Federal Transit Administration, Transit Cooperative Research Program, National Research Council (U.S.). Transportation Research Board, Donna L. Vlasak, och Jon Williams. Synthesis of Information Related to Transit Problems. [Washington, D.C.]: Transportation Research Board, National Research Council, 2006.
MLA-referens (9:e uppl.)United States. Federal Transit Administration, et al. Synthesis of Information Related to Transit Problems. Transportation Research Board, National Research Council, 2006.