APA (7th ed.) Citation

Geological Society of London & Geologists' Association. (1985). Geology today. [Blackwell Scientific Publications].

Chicago Style (17th ed.) Citation

Geological Society of London and Geologists' Association. Geology Today. [Oxford, England]: [Blackwell Scientific Publications], 1985.

MLA (9th ed.) Citation

Geological Society of London and Geologists' Association. Geology Today. [Blackwell Scientific Publications], 1985.