Não informado. (2004). Railway Mechanical and Electrical Engineer. Simmons Boardman Publishing.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Railway Mechanical and Electrical Engineer. Philadelphia, Pa: Simmons Boardman Publishing, 2004.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Railway Mechanical and Electrical Engineer. Simmons Boardman Publishing, 2004.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.