Pearce, F. (2010). Earth then and now: Amazing images of our changing world (Rev. pbk. ed.). Firefly Books.
Citazione stile Chigago Style (17a edizione)Pearce, Fred. Earth Then and Now: Amazing Images of Our Changing World. Rev. pbk. ed. New York: Firefly Books, 2010.
Citatione MLA (9a ed.)Pearce, Fred. Earth Then and Now: Amazing Images of Our Changing World. Rev. pbk. ed. Firefly Books, 2010.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.