Wallace, R. A. (1996). Biology: The science of life. New York: HarperCollins.
Dyfyniad Arddull ChicagoWallace, Robert A. Biology: The Science of Life. New York: HarperCollins, 1996.
Dyfyniad MLAWallace, Robert A. Biology: The Science of Life. New York: HarperCollins, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.