APA (7th ed.) Citation

Sale, C. J., Friedman, B., & Wilson, G. (1986). Understanding our world (1. publ.). Longman Cheshire.

Chicago Style (17th ed.) Citation

Sale, Colin J., Ben Friedman, and Graeme Wilson. Understanding Our World. 1. publ. Melbourne: Longman Cheshire, 1986.

MLA (9th ed.) Citation

Sale, Colin J., et al. Understanding Our World. 1. publ. Longman Cheshire, 1986.