Cita APA (7a ed.)
Darwin, C. (1958). The origin of species. New American Library.
Cita Chicago Style (17a ed.)
Darwin, Charles. The Origin of Species. New York: New American Library, 1958.
Cita MLA (9a ed.)
Darwin, Charles. The Origin of Species. New American Library, 1958.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.