APA (7th ed.) Citation

Richardson, G. P. (1991). Feedback thought in social science and systems theory. University of Pennsylvania Press.

Chicago Style (17th ed.) Citation

Richardson, George P. Feedback Thought in Social Science and Systems Theory. Philadelphia: University of Pennsylvania Press, 1991.

MLA (9th ed.) Citation

Richardson, George P. Feedback Thought in Social Science and Systems Theory. University of Pennsylvania Press, 1991.