Van Rijsbergen, C. J. Information retrieval (2nd. ed.). Butterworths.
Chicago Edition CitationVan Rijsbergen, C. J. Information Retrieval. 2nd. ed. London: Butterworths.
Cita MLAVan Rijsbergen, C. J. Information Retrieval. 2nd. ed. Butterworths.
Atenció: Aquestes cites poden no estar 100% correctes.