Widder, D. V. (1971). Advanced calculus. Academic Press.
Dyfyniad Arddull ChicagoWidder, David V. Advanced Calculus. New York: Academic Press, 1971.
Dyfyniad MLAWidder, David V. Advanced Calculus. Academic Press, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.