George, J. D. (1979). Marine life: An illustrated encyclopedia of invertebrates in the sea. John Wiley and Sons.
Citazione stile Chigago Style (17a edizione)George, J. David. Marine Life: An Illustrated Encyclopedia of Invertebrates in the Sea. John Wiley and Sons, 1979.
Citatione MLA (9a ed.)George, J. David. Marine Life: An Illustrated Encyclopedia of Invertebrates in the Sea. John Wiley and Sons, 1979.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.