Oberg, E., Jones, F. D., Horton, H. L., Ryffel, H. H., & McCauley, C. J. (2020). Machinery´s handbook (31st edition.). South Norwalk , Connecticut, United States: Industrial Press, Inc..

Oberg, Erik, Franklin D. Jones, Holbrook Lynedon Horton, Henry H. Ryffel, and Christopher J. McCauley. Machinery´s Handbook. 31st edition. South Norwalk , Connecticut, United States: Industrial Press, Inc., 2020.

Oberg, Erik, et al. Machinery´s Handbook. 31st edition. South Norwalk , Connecticut, United States: Industrial Press, Inc., 2020.