Não informado. (1985). Offshore Fleet Economics. Offshore Data Services.
Lua i Stíl Chicago (17ú heag.)Não informado. Offshore Fleet Economics. Houston, Tex: Offshore Data Services, 1985.
Lua MLA (8ú heag.)Não informado. Offshore Fleet Economics. Offshore Data Services, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.