APA (7th ed.) Citation

Geological Society of London, issuing body, & Geologists' Association, issuing body. (1985). Geology today. Blackwell Science.

Chicago Style (17th ed.) Citation

Geological Society of London, issuing body, and issuing body Geologists' Association. Geology Today. [Oxford, England]: Blackwell Science, 1985.

MLA (9th ed.) Citation

Geological Society of London, issuing body, and issuing body Geologists' Association. Geology Today. Blackwell Science, 1985.