APA (7th ed.) Citation

Sparck Jones, K. (1990). Retrieving information or answering questions? The British Library.

Chicago Style (17th ed.) Citation

Sparck Jones, Karen. Retrieving Information or Answering Questions? London: The British Library, 1990.

MLA (9th ed.) Citation

Sparck Jones, Karen. Retrieving Information or Answering Questions? The British Library, 1990.