APA (7th ed.) Citation

Barbieri, M., & Thom, R. (1985). The semantic theory of evolution. Harwood Academic Publishers.

Chicago Style (17th ed.) Citation

Barbieri, Marcello, and René Thom. The Semantic Theory of Evolution. Chur [Suiza] [etc.]: Harwood Academic Publishers, 1985.

MLA (9th ed.) Citation

Barbieri, Marcello, and René Thom. The Semantic Theory of Evolution. Harwood Academic Publishers, 1985.