Doyle, P., & Lowry, F. M. D. (1996). Understanding fossils: An introduction to invertebrate palaeontology. Wiley.
Lua i Stíl Chicago (17ú heag.)Doyle, Peter, agus Florence M. D. Lowry. Understanding Fossils: An Introduction to Invertebrate Palaeontology. Chichester, New York: Wiley, 1996.
Lua MLA (9ú heag.)Doyle, Peter, agus Florence M. D. Lowry. Understanding Fossils: An Introduction to Invertebrate Palaeontology. Wiley, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.