Roberts, S. (1999). Essential JTAPI: Java telephony API : design telecom projects with Java. Prentice Hall PTR.
Chicago Style (17th ed.) CitationRoberts, Spencer. Essential JTAPI: Java Telephony API : Design Telecom Projects with Java. Upper Saddle River, N.J: Prentice Hall PTR, 1999.
MLA citiranjeRoberts, Spencer. Essential JTAPI: Java Telephony API : Design Telecom Projects with Java. Prentice Hall PTR, 1999.
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