Krar, S. F., & Check, A. F. (1997). Technology of machine tools (5th ed.). Glencoe/McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Krar, Stephen F., agus Albert F. Check. Technology of Machine Tools. 5th ed. New York: Glencoe/McGraw-Hill, 1997.
Lua MLA (9ú heag.)Krar, Stephen F., agus Albert F. Check. Technology of Machine Tools. 5th ed. Glencoe/McGraw-Hill, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.