Não informado. Transport policy and decision making. Martinus Nijhoff Publishers.
Chicago-referens (17:e uppl.)Não informado. Transport Policy and Decision Making. The Hague, Holanda: Martinus Nijhoff Publishers.
MLA-referens (8:e uppl.)Não informado. Transport Policy and Decision Making. Martinus Nijhoff Publishers.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.