APA (7th ed.) Citation

Parsons, T. (1991). The social system (New ed., 1. publ.). Routledge.

Chicago Style (17th ed.) Citation

Parsons, Talcott. The Social System. New ed., 1. publ. London: Routledge, 1991.

MLA (9th ed.) Citation

Parsons, Talcott. The Social System. New ed., 1. publ. Routledge, 1991.