APA (7th ed.) Citation

Cleal, C. J., & Thomas, B. A. (1994). Plant fossils of the British coal measures. Palaeontological Assoc.

Chicago Style (17th ed.) Citation

Cleal, Christopher J., and Barry A. Thomas. Plant Fossils of the British Coal Measures. London: Palaeontological Assoc, 1994.

MLA (9th ed.) Citation

Cleal, Christopher J., and Barry A. Thomas. Plant Fossils of the British Coal Measures. Palaeontological Assoc, 1994.