Ryan, M. (1993). Prentice Hall advanced mathematics: A precalculus approach. Prentice Hall.
Dyfyniad Arddull ChicagoRyan, Merilyn. Prentice Hall Advanced Mathematics: A Precalculus Approach. Englewood Cliffs, N. J: Prentice Hall, 1993.
Dyfyniad MLARyan, Merilyn. Prentice Hall Advanced Mathematics: A Precalculus Approach. Prentice Hall, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.