Não informado. (1974). Special report. National Research Council, Transportation Research Board.
Lua i Stíl Chicago (17ú heag.)Não informado. Special Report. Washington: National Research Council, Transportation Research Board, 1974.
Lua MLA (8ú heag.)Não informado. Special Report. National Research Council, Transportation Research Board, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.