Não informado. (1969). Diesel and gas turbine progress worldwide. Diesel & Gas Turbine Publications.
Lua i Stíl Chicago (17ú heag.)Não informado. Diesel and Gas Turbine Progress Worldwide. Brookfield, Wis: Diesel & Gas Turbine Publications, 1969.
Lua MLA (8ú heag.)Não informado. Diesel and Gas Turbine Progress Worldwide. Diesel & Gas Turbine Publications, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.