Berkman, R. I. (1990). Find it fast: How to uncover expert information on any subject (Updated and expanded ed.). Perennial Library.
Citace podle Chicago (17th ed.)Berkman, Robert I. Find It Fast: How to Uncover Expert Information on Any Subject. Updated and expanded ed. New York: Perennial Library, 1990.
Citace podle MLA (9th ed.)Berkman, Robert I. Find It Fast: How to Uncover Expert Information on Any Subject. Updated and expanded ed. Perennial Library, 1990.
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