Weaver, W., Timoshenko, S., Young, D. H., Young, D. H., Timoshenko, S. P., Young, D. H., . . . Young, D. H. (1990). Vibration problems in engineering (5th ed.). New York: Wiley.

Weaver, William, Stephen Timoshenko, D. H. Young, D. H. Young, Stephen P. Timoshenko, Donovan H. Young, D. H. 1904- Young, Stephen P. Timoshenko, and Donovan Harold Young. Vibration Problems in Engineering. 5th ed. New York: Wiley, 1990.

Weaver, William, et al. Vibration Problems in Engineering. 5th ed. New York: Wiley, 1990.