Gould, S. J. (2002). I have landed: The end of a beginning in natural history. Harmony Books.
Citazione stile Chigago Style (17a edizione)Gould, Stephen Jay. I Have Landed: The End of a Beginning in Natural History. New York: Harmony Books, 2002.
Citatione MLA (9a ed.)Gould, Stephen Jay. I Have Landed: The End of a Beginning in Natural History. Harmony Books, 2002.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.