Rujukan Kordata

  1. ↑ Haeckel, E. (1874). Anthropogenie oder Entwicklungsgeschichte des Menschen. Leipzig: Engelmann.
  2. ↑
  3. ↑ Benton, M.J. (2004). Vertebrate Palaeontology, Third Edition. Blackwell Publishing, 472 pp. The classification scheme is available online
  4. ↑ The amphioxus genome and the evolution of the chordate karyotype, Nicholas H. Putnam, et al. Nature vol 453 p. 1064-1071, June 19, 2000