APA (7th ed.) Citation

Beishon, J., & Peters, G. (1972). Systems theory. The Open University Press.

Chicago Style (17th ed.) Citation

Beishon, John, and Geoff Peters. Systems Theory. London: The Open University Press, 1972.

MLA (8th ed.) Citation

Beishon, John, and Geoff Peters. Systems Theory. The Open University Press, 1972.