Koenig, R. A., & Taylor, J. P. (1988). Protection of pipelines through highway roadbeds. Transportation Research Board, National Research Council.
Lua i Stíl Chicago (17ú heag.)Koenig, R. A., agus J. P. Taylor. Protection of Pipelines Through Highway Roadbeds. Washington, D.C: Transportation Research Board, National Research Council, 1988.
Lua MLA (9ú heag.)Koenig, R. A., agus J. P. Taylor. Protection of Pipelines Through Highway Roadbeds. Transportation Research Board, National Research Council, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.