Gaya APA

Tydeman, J. et al (1982). Teletext and Videotex in the United States, Market Potential, Technology, Public Policy Issues . Amerika: Mc.Graw Hill.

Gaya MLA

Tydeman, J.. et al. "Teletext and Videotex in the United States, Market Potential, Technology, Public Policy Issues". Amerika: Mc.Graw Hill, 1982. Text.