Cramer, H. (1955). Elements of probability theory. John Wiley.
Dyfyniad Arddull ChicagoCramer, Harald. Elements of Probability Theory. New York: John Wiley, 1955.
Dyfyniad MLACramer, Harald. Elements of Probability Theory. John Wiley, 1955.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.