Não informado. (2004). Journal of Public Transportation. University of South Florida, National Center for Transit Research.
Citação do estilo Chicago (17ª ed.)Não informado. Journal of Public Transportation. Tampa, Fla: University of South Florida, National Center for Transit Research, 2004.
Citação MLA (8ª ed.)Não informado. Journal of Public Transportation. University of South Florida, National Center for Transit Research, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.