Levinson, H. S. (1991). Supervision strategies for improved reliability of bus routes. Transportation Research Board, National Research Council.
Lua i Stíl Chicago (17ú heag.)Levinson, Herbert S. Supervision Strategies for Improved Reliability of Bus Routes. Washington, D.C: Transportation Research Board, National Research Council, 1991.
Lua MLA (9ú heag.)Levinson, Herbert S. Supervision Strategies for Improved Reliability of Bus Routes. Transportation Research Board, National Research Council, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.