Weichert, C. K., & Presch, W. (1975). Elements of chordate anatomy (4th ed.). McGraw-Hill.
Dyfyniad Arddull ChicagoWeichert, Charles K., and William Presch. Elements of Chordate Anatomy. 4th ed. New York: McGraw-Hill, 1975.
Dyfyniad MLAWeichert, Charles K., and William Presch. Elements of Chordate Anatomy. 4th ed. McGraw-Hill, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.