Gough, W., Richards, J. P. G. 1., Williams, R. P. 1., Richards, J. P. G. 1., Williams, R. P. 1., Richards, J. P. G., & Williams, R. P. (1996). Vibrations and waves (2nd ed.). London ; New York: Prentice Hall.

Gough, W., J. P. G. 1932- Richards, R. P. 1937- Williams, J. P. G 1932- Richards, R. P 1937- Williams, J. P. G. Richards, and R. P. Williams. Vibrations and Waves. 2nd ed. London ; New York: Prentice Hall, 1996.

Gough, W., et al. Vibrations and Waves. 2nd ed. London ; New York: Prentice Hall, 1996.