APA (7th ed.) Citation

Sparck Jones, K. (1971). Automatic keyword classification for information retrieval. Archon Books.

Chicago Style (17th ed.) Citation

Sparck Jones, Karen. Automatic Keyword Classification for Information Retrieval. [Hamden, Conn.]: Archon Books, 1971.

MLA (9th ed.) Citation

Sparck Jones, Karen. Automatic Keyword Classification for Information Retrieval. Archon Books, 1971.

Warning: These citations may not always be 100% accurate.