APA (7th ed.) Citation

Butler, J. L., Butler, A. L., & Butler, S. C. (2011). The modal projector. Journal of the Acoustical Society of America, 129(4), 1881. https://doi.org/10.1121/1.3559684

Chicago Style (17th ed.) Citation

Butler, John L., Alexander L. Butler, and Stephen C. Butler. "The Modal Projector." Journal of the Acoustical Society of America 129, no. 4 (2011): 1881. https://doi.org/10.1121/1.3559684.

MLA (9th ed.) Citation

Butler, John L., et al. "The Modal Projector." Journal of the Acoustical Society of America, vol. 129, no. 4, 2011, p. 1881, https://doi.org/10.1121/1.3559684.