Morton, H. T. (1965). Anti-friction bearings. s.n.
Lua i Stíl Chicago (17ú heag.)Morton, Hudson T. Anti-friction Bearings. Ann Arbor: s.n, 1965.
Lua MLA (9ú heag.)Morton, Hudson T. Anti-friction Bearings. s.n, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.