Cita APA (7th ed.)
Katz, W. A. (1997). Introduction to reference work (7th ed.). McGraw-Hill.
Cita Chicago (17th ed.)
Katz, William A. Introduction to Reference Work. 7th ed. New York: McGraw-Hill, 1997.
Cita MLA (9th ed.)
Katz, William A. Introduction to Reference Work. 7th ed. McGraw-Hill, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.