Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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