APA (7th ed.) Citation

Geological Society of London. Geological Information Group. (1978). Geological directory of the British Isles: A guide to information sources. [The Society].

Chicago Style (17th ed.) Citation

Geological Society of London. Geological Information Group. Geological Directory of the British Isles: A Guide to Information Sources. [London]: [The Society], 1978.

MLA (8th ed.) Citation

Geological Society of London. Geological Information Group. Geological Directory of the British Isles: A Guide to Information Sources. [The Society], 1978.