APA (7th ed.) Citation

Palaeontological Association, Swift, A., & Martill, D. M. (1999). Fossils of the Rhaetian Penarth group. Paleontological Association.

Chicago Style (17th ed.) Citation

Palaeontological Association, Andrew Swift, and David M. Martill. Fossils of the Rhaetian Penarth Group. London: Paleontological Association, 1999.

MLA (8th ed.) Citation

Palaeontological Association, et al. Fossils of the Rhaetian Penarth Group. Paleontological Association, 1999.