Kerrod, R. (1997). Macmillan Revised ENCYCLOPEDIA of SCIENCE Transportation 10. Macmillan Reference.
Lua i Stíl Chicago (17ú heag.)Kerrod, Robin. Macmillan Revised ENCYCLOPEDIA of SCIENCE Transportation 10. Macmillan Reference, 1997.
Lua MLA (8ú heag.)Kerrod, Robin. Macmillan Revised ENCYCLOPEDIA of SCIENCE Transportation 10. Macmillan Reference, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.