APA (7th ed.) Citation
Jones, K. S. (1971). Automatic keyword classification for information retrieval. Butterworths.
Chicago Style (17th ed.) Citation
Jones, Karen Sparck. Automatic Keyword Classification for Information Retrieval. Londres: Butterworths, 1971.
MLA (9th ed.) Citation
Jones, Karen Sparck. Automatic Keyword Classification for Information Retrieval. Butterworths, 1971.
Warning: These citations may not always be 100% accurate.