Lesk, M. (1997). Practical digital libraries: Books, bytes, and bucks. San Francisco, Calif: Morgan Kaufmann Publishers.
Dyfyniad Arddull ChicagoLesk, Michael. Practical Digital Libraries: Books, Bytes, and Bucks. San Francisco, Calif: Morgan Kaufmann Publishers, 1997.
Dyfyniad MLALesk, Michael. Practical Digital Libraries: Books, Bytes, and Bucks. San Francisco, Calif: Morgan Kaufmann Publishers, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.