APA

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

Chicago

Heaps H S, . 1978. Information retrieval, computational and theoretical aspects. New York: Academic Press.

Harvard

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

MLA

Heaps H S, . Information retrieval, computational and theoretical aspects. New York: Academic Press. 1978.