Garstens, H. L., & Jackson, S. B. (1967). Mathematics for elementary school teachers. Macmillan.
Dyfyniad Arddull ChicagoGarstens, Helen L., and Stanley B. Jackson. Mathematics for Elementary School Teachers. New York: Macmillan, 1967.
Dyfyniad MLAGarstens, Helen L., and Stanley B. Jackson. Mathematics for Elementary School Teachers. Macmillan, 1967.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.