APA   Click to copy
Darwin, C. (2005). The Expression of Emotion in Man And Animals.

Chicago/Turabian   Click to copy
Darwin, Charles. The Expression of Emotion in Man And Animals, 2005.

MLA   Click to copy
Darwin, Charles. The Expression of Emotion in Man And Animals. 2005.

@book{charles2005a,
  title = {The Expression of Emotion in Man And Animals},
  year = {2005},
  month = apr,
  day = {10},
  author = {Darwin, Charles},
  month_numeric = {4}
}