APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Heaps, H. S. Information Retrieval, Computational and Theoretical Aspects. New York: Academic Press, 1978.

MLA (8th ed.) Citation

Heaps, H. S. Information Retrieval, Computational and Theoretical Aspects. Academic Press, 1978.