Não informado. (2009). Proceedings of the American Transit Engineering Association. American Transit Engineering Association.
Citação do estilo Chicago (17ª ed.)Não informado. Proceedings of the American Transit Engineering Association. New York: American Transit Engineering Association, 2009.
Citação MLA (8ª ed.)Não informado. Proceedings of the American Transit Engineering Association. American Transit Engineering Association, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.