Ella Thea Smith. (1959). Exploring biology: The science of living things. New York: Harper, Brace and World.
Dyfyniad Arddull ChicagoElla Thea Smith. Exploring Biology: The Science of Living Things. New York: Harper, Brace and World, 1959.
Dyfyniad MLAElla Thea Smith. Exploring Biology: The Science of Living Things. New York: Harper, Brace and World, 1959.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.