Cita APA (7th ed.)

Clarkson, E. N. K. (1979). Invertebrate palaeontology and evolution. G. Allen & Unwin.

Cita Chicago (17th ed.)

Clarkson, E. N. K. Invertebrate Palaeontology and Evolution. London ; Boston: G. Allen & Unwin, 1979.

Cita MLA (8th ed.)

Clarkson, E. N. K. Invertebrate Palaeontology and Evolution. G. Allen & Unwin, 1979.