Pizonial Sasrihila
Universitas Indonesia, 2002
UI - Skripsi (Membership)
Jacobs, Allan B.
MIT Press, 1993
Buku Teks
Rapoport, Amos
Plenum Press, 1990
Buku Teks
American Association of State Highway and Transportation Officials
American Association of State Highway and Transportation Officials, 2011
Buku Teks
Wass, Alonzo
Reston, VA: Reston Publishing, 1973
Buku Teks