Tootill, E., & ...[et al.]. (1988). Dictionary of biology. Facts on File.
Dyfyniad Arddull ChicagoTootill, Elizabeth, and ...[et al.]. Dictionary of Biology. New York: Facts on File, 1988.
Dyfyniad MLATootill, Elizabeth, and ...[et al.]. Dictionary of Biology. Facts on File, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.