Não informado. (2009). Proceedings of the American Transit Engineering Association. American Transit Engineering Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Proceedings of the American Transit Engineering Association. New York: American Transit Engineering Association, 2009.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Proceedings of the American Transit Engineering Association. American Transit Engineering Association, 2009.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.