APA (7th ed.) Citation

Middleton, J., & Waltham, T. (1986). The underground atlas: A gazetteer of the world's cave regions. Hale.

Chicago Style (17th ed.) Citation

Middleton, John, and Tony Waltham. The Underground Atlas: A Gazetteer of the World's Cave Regions. London: Hale, 1986.

MLA (9th ed.) Citation

Middleton, John, and Tony Waltham. The Underground Atlas: A Gazetteer of the World's Cave Regions. Hale, 1986.