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Dyfyniad Arddull ChicagoOppenheim, Alan V., Alan S. Willsky, and Syed Hamid Nawab. Signals & Systems. 2nd ed. Upper Saddle River, N.J.: Prentice Hall, 1997.
Dyfyniad MLAOppenheim, Alan V., et al. Signals & Systems. 2nd ed. Prentice Hall, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.