Allendoerfer, C. B., & Carl B. Allendoerfe; Cletus O.Oakley. (1969). Principles of mathematics (3.). McGraw- Hill.
Dyfyniad Arddull ChicagoAllendoerfer, Carl B., and Carl B. Allendoerfe; Cletus O.Oakley. Principles of Mathematics. 3. New York: McGraw- Hill, 1969.
Dyfyniad MLAAllendoerfer, Carl B., and Carl B. Allendoerfe; Cletus O.Oakley. Principles of Mathematics. 3. McGraw- Hill, 1969.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.