APA (7th ed.) Citation

Squires, G. (1971). Information Retrieval at Sub-document Level.

Chicago Style (17th ed.) Citation

Squires, Geoffrey. Information Retrieval at Sub-document Level. 1971.

MLA (9th ed.) Citation

Squires, Geoffrey. Information Retrieval at Sub-document Level. 1971.

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