Grava, S. (2003). Urban transportation systems. McGraw-Hill.
Chicago Style (17th ed.) CitationGrava, Sigurd. Urban Transportation Systems. McGraw-Hill, 2003.
MLA引文Grava, Sigurd. Urban Transportation Systems. McGraw-Hill, 2003.
警告：這些引文格式不一定是100％准確.
APA引文