SPOTTS, M., & SHOUP, T. (1998). Design of machine element (Ed.7.). Prentice-Hall International.
Cita Chicago (17th ed.)SPOTTS, M.F, i T.E SHOUP. Design of Machine Element. Ed.7. New Jersey: Prentice-Hall International, 1998.
Cita MLA (9th ed.)SPOTTS, M.F, i T.E SHOUP. Design of Machine Element. Ed.7. Prentice-Hall International, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.