APA-viite (7. p.)
ebrary, Inc, Jorna, R. J., Heusden, B. v., & Posner, R. (1993). Signs, search and communication: Semiotic aspects of artificial intelligence. W. de Gruyter.
Chicago-viite (17. p.)
ebrary, Inc, René J. Jorna, Barend van Heusden, ja Roland Posner. Signs, Search and Communication: Semiotic Aspects of Artificial Intelligence. Berlin ; New York: W. de Gruyter, 1993.
MLA-viite (9. p.)
ebrary, Inc, et al. Signs, Search and Communication: Semiotic Aspects of Artificial Intelligence. W. de Gruyter, 1993.
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