Lua APA (7ú heag.)

Não informado. (1968). Research Results Digest. National Cooperative Highway Research Program.

Lua i Stíl Chicago (17ú heag.)

Não informado. Research Results Digest. Washington: National Cooperative Highway Research Program, 1968.

Lua MLA (8ú heag.)

Não informado. Research Results Digest. National Cooperative Highway Research Program, 1968.

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