Não informado. (2000). Transportation engineer. American Cartagemen Publishing Corporation.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Transportation Engineer. Mount Morris, Ill: American Cartagemen Publishing Corporation, 2000.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Transportation Engineer. American Cartagemen Publishing Corporation, 2000.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.