APA (7th ed.) Citation

Ryan, G. W., Kshirsagar, A. M., Ringer, L. J., & Williams, G. N. (1976). Estimation of population abundances using auditory information. Ryan.

Chicago Style (17th ed.) Citation

Ryan, George William, A. M. Kshirsagar, Larry J. Ringer, and G. N. Williams. Estimation of Population Abundances Using Auditory Information. [College Station, Tex.]: Ryan, 1976.

MLA (9th ed.) Citation

Ryan, George William, et al. Estimation of Population Abundances Using Auditory Information. Ryan, 1976.