APA (7th ed.) Citation

Darwin, C., & Case, D. (1992). The origin of species. Tantor Media.

Chicago Style (17th ed.) Citation

Darwin, Charles, and David Case. The Origin of Species. [Place of publication not identified]: Tantor Media, 1992.

MLA (9th ed.) Citation

Darwin, Charles, and David Case. The Origin of Species. Tantor Media, 1992.