APA (7th ed.) Citation

Marsden, B., Marsden, V., & Catling, S. (1991). In the mountains (1. publ.). Oliver & Boyd.

Chicago Style (17th ed.) Citation

Marsden, Bill, Vera Marsden, and Simon Catling. In the Mountains. 1. publ. Harlow: Oliver & Boyd, 1991.

MLA (9th ed.) Citation

Marsden, Bill, et al. In the Mountains. 1. publ. Oliver & Boyd, 1991.