Dyfyniad APA

Darwin, C. (2013). The expression of the emotions in man and animals. Cambridge University.

Dyfyniad Arddull Chicago

Darwin, Charles. The Expression of the Emotions in Man and Animals. London: Cambridge University, 2013.

Dyfyniad MLA

Darwin, Charles. The Expression of the Emotions in Man and Animals. Cambridge University, 2013.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.