Sarkar, A. D. (1980). Friction and wear. Academic Press.
Lua i Stíl Chicago (17ú heag.)Sarkar, A. D. Friction and Wear. London ; New York: Academic Press, 1980.
Lua MLA (8ú heag.)Sarkar, A. D. Friction and Wear. Academic Press, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.