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.