Lua APA (7ú heag.)

Não informado. (1931). Highway research abstracts. National Research Council, Highway Research Board.

Lua i Stíl Chicago (17ú heag.)

Não informado. Highway Research Abstracts. Washington: National Research Council, Highway Research Board, 1931.

Lua MLA (8ú heag.)

Não informado. Highway Research Abstracts. National Research Council, Highway Research Board, 1931.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.