APA (7th ed.) Citation

Ball & Bell. (1991). Environmental law: The law and policy relating to the protection of the environment. Blackstone.

Chicago Style (17th ed.) Citation

Ball and Bell. Environmental Law: The Law and Policy Relating to the Protection of the Environment. London: Blackstone, 1991.

MLA (9th ed.) Citation

Ball and Bell. Environmental Law: The Law and Policy Relating to the Protection of the Environment. Blackstone, 1991.