Koenig, R. A., & Taylor, J. P. (1988). Protection of pipelines through highway roadbeds. Transportation Research Board, National Research Council.
Chicago-referens (17:e uppl.)Koenig, R. A., och J. P. Taylor. Protection of Pipelines Through Highway Roadbeds. Washington, D.C: Transportation Research Board, National Research Council, 1988.
MLA-referens (9:e uppl.)Koenig, R. A., och J. P. Taylor. Protection of Pipelines Through Highway Roadbeds. Transportation Research Board, National Research Council, 1988.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.