APA

Lancaster F. W., . (1968). Information retrieval systems. New York: John Wiley & Sons.

Chicago

Lancaster F Wilfrid, . 1968. Information retrieval systems. New York: John Wiley & Sons.

Harvard

Lancaster F. W., . (1968). Information retrieval systems. New York: John Wiley & Sons.

MLA

Lancaster F Wilfrid, . Information retrieval systems. New York: John Wiley & Sons. 1968.