Matson, Theodore M.
McGraw-Hill, 1955
Buku Teks
Hobbs, F.D.
Pergamon Press, 1974
Buku Teks
Institute of Traffic Engineers ; John E. Baerwald, editor, associate editors, Matthew J. Huber, Louis E. Keefer
Prentice-Hall, 1976
Buku Referensi
Box, Paul C.
Institut of Transportation Engineers, 1976
Buku Referensi
edited by Wolfgang S. Homburger, Louis E. Keefer and William R. McGrath
Prentice-Hall, 1994
Buku Referensi