APA (7th ed.) Citation

Open Systems Group. (1981). Systems behaviour (3rd ed.). Harper and Row in association with the Open University Press.

Chicago Style (17th ed.) Citation

Open Systems Group. Systems Behaviour. 3rd ed. London: Harper and Row in association with the Open University Press, 1981.

MLA (9th ed.) Citation

Open Systems Group. Systems Behaviour. 3rd ed. Harper and Row in association with the Open University Press, 1981.