APA (7th ed.) Citation

Palmer, D., & Rickards, B. (1990). Graptolites: Writing in the rocks. Boydell Press.

Chicago Style (17th ed.) Citation

Palmer, Douglas, and Barrie Rickards. Graptolites: Writing in the Rocks. Woodbridge, Suffolk ; Rochester, NY, USA: Boydell Press, 1990.

MLA (9th ed.) Citation

Palmer, Douglas, and Barrie Rickards. Graptolites: Writing in the Rocks. Boydell Press, 1990.