Adler, H. A. (1987). Economic appraisal of transport projects: A manual with casestudies (Revised and expanded edition.). Johns Hopkins University Press.
Lua i Stíl Chicago (17ú heag.)Adler, Hans A. Economic Appraisal of Transport Projects: A Manual with Casestudies. Revised and expanded edition. Baltimore: Johns Hopkins University Press, 1987.
Lua MLA (9ú heag.)Adler, Hans A. Economic Appraisal of Transport Projects: A Manual with Casestudies. Revised and expanded edition. Johns Hopkins University Press, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.