Freeman, Roger L., author
Wiley, 1985
Buku Referensi
Box, Paul C., author
Institut of Transportation Engineers, 1976
Buku Referensi
Butler, Robert Brown, author
McGraw-Hill, 1984
Buku Referensi
Lindeburg, Michael R., author
Professional Publications, 1984
Buku Teks
edited by George A. Hawkins
McGraw-Hill, 1968
Buku Teks