APA
Charles Darwin, . (2009). Journal of Researches into the Geology and Natural History of the Various Countries visited by H. M. S. Beagle. NEW YORK: Cambridge University Press.
Chicago
Charles Darwin, . 2009. Journal of Researches into the Geology and Natural History of the Various Countries visited by H. M. S. Beagle. NEW YORK: Cambridge University Press.
Harvard
Charles Darwin, . (2009). Journal of Researches into the Geology and Natural History of the Various Countries visited by H. M. S. Beagle. NEW YORK: Cambridge University Press.
MLA
Charles Darwin, . Journal of Researches into the Geology and Natural History of the Various Countries visited by H. M. S. Beagle. NEW YORK: Cambridge University Press. 2009.
