APA (7th ed.) Citation

Sale, C. J., Friedman, B., & Wilson, G. (1981). Our changing world. Book 2. The expanding artificial ecosystems. Longman Cheshire.

Chicago Style (17th ed.) Citation

Sale, Colin J., Ben Friedman, and Graeme Wilson. Our Changing World. Book 2. The Expanding Artificial Ecosystems. Melbourne: Longman Cheshire, 1981.

MLA (8th ed.) Citation

Sale, Colin J., et al. Our Changing World. Book 2. The Expanding Artificial Ecosystems. Longman Cheshire, 1981.