APA (7th ed.) Citation

Smith, F., Welch, P. S., & Harry, H. W. (1919). Annelids, parasitic worms, Protozoans, etc. J. de L. Taché.

Chicago Style (17th ed.) Citation

Smith, Frank, Paul S. Welch, and Harold W. Harry. Annelids, Parasitic Worms, Protozoans, Etc. Ottawa: J. de L. Taché, 1919.

MLA (9th ed.) Citation

Smith, Frank, et al. Annelids, Parasitic Worms, Protozoans, Etc. J. de L. Taché, 1919.