APA (7th ed.) Citation

Porteous, A. (1972). Maintaining the environment / prepared by Andrew Porteous for the Technology Foundation Course Team. Open University Press.

Chicago Style (17th ed.) Citation

Porteous, Andrew. Maintaining the Environment / Prepared by Andrew Porteous for the Technology Foundation Course Team. Bletchley: Open University Press, 1972.

MLA (9th ed.) Citation

Porteous, Andrew. Maintaining the Environment / Prepared by Andrew Porteous for the Technology Foundation Course Team. Open University Press, 1972.

Warning: These citations may not always be 100% accurate.