Mann, T. (1987). A guide to library research methods. Oxford University Press.
Cita Chicago (17th ed.)Mann, Thomas. A Guide to Library Research Methods. New York: Oxford University Press, 1987.
Cita MLA (9th ed.)Mann, Thomas. A Guide to Library Research Methods. Oxford University Press, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.