APA   Click to copy
Darwin, C. (1859). On the Origin of Species: By Means of Natural Selection or The Preservation of Favoured Races in the Struggle for Life.

Chicago/Turabian   Click to copy
Darwin, Charles. On the Origin of Species: By Means of Natural Selection or The Preservation of Favoured Races in the Struggle for Life, 1859.

MLA   Click to copy
Darwin, Charles. On the Origin of Species: By Means of Natural Selection or The Preservation of Favoured Races in the Struggle for Life. 1859.

@book{charles1859a,
  title = {On the Origin of Species: By Means of Natural Selection or The Preservation of Favoured Races in the Struggle for Life},
  year = {1859},
  month = nov,
  day = {24},
  author = {Darwin, Charles},
  month_numeric = {11}
}