Não informado. (2020). Modern Railroads Rail Transit. Cahners Publications Company.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Modern Railroads Rail Transit. Chicago, Ill: Cahners Publications Company, 2020.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Modern Railroads Rail Transit. Cahners Publications Company, 2020.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.