Sapien, M. (1997). Mastering ISDN (Integrated Services Digital Network). BPB.
Chicago-čujuhus (17. p.)Sapien, Mike. Mastering ISDN (Integrated Services Digital Network). New Delhi: BPB, 1997.
MLA-čujuhus (9. p.)Sapien, Mike. Mastering ISDN (Integrated Services Digital Network). BPB, 1997.
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