edited by H. Douglas Robertson, Joseph E. Hummer and Donna C. Nelson
Prentice-Hall, 1994
Buku Teks SO
edited by Wolfgang S. Homburger, Louis E. Keefer and William R. McGrath
Prentice-Hall, 1994
Buku Referensi
Institute of Traffic Engineers ; John E. Baerwald, editor, associate editors, Matthew J. Huber, Louis E. Keefer
Prentice-Hall, 1976
Buku Referensi
Myer Kutz
McGraw-Hill, 2011
Buku Teks
Banks, James H.
WCB McGraw-Hill, 1998
Buku Teks