APA (7th ed.) Citation

Heaps, H. S. (1978). Information retrieval: Computational and theoretical aspects. Academic Press.

Chicago Style (17th ed.) Citation

Heaps, Harold Stanley. Information Retrieval: Computational and Theoretical Aspects. New York [u.a.]: Academic Press, 1978.

MLA (9th ed.) Citation

Heaps, Harold Stanley. Information Retrieval: Computational and Theoretical Aspects. Academic Press, 1978.