Cita APA

Clarkson, E. N. K., & Clarkson, E. N. K. (1998). Invertebrate palaeontology and evolution (4. edition.). Oxford: Blackwell Science.

Citación estilo Chicago

Clarkson, Euan Neilson Kerr, y Euan Neilson Kerr Clarkson. Invertebrate Palaeontology and Evolution. 4. edition. Oxford: Blackwell Science, 1998.

Cita MLA

Clarkson, Euan Neilson Kerr, y Euan Neilson Kerr Clarkson. Invertebrate Palaeontology and Evolution. 4. edition. Oxford: Blackwell Science, 1998.