Não informado. (1967). Journal of Lubrication Technology. American Society of Mechanical Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Lubrication Technology. New York: American Society of Mechanical Engineers, 1967.
Lua MLA (8ú heag.)Não informado. Journal of Lubrication Technology. American Society of Mechanical Engineers, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.