Cita APA (7a ed.)
Katz, W. A. (1987). Introduction to reference work (5th. ed.). McGraw-Hill.
Cita Chicago Style (17a ed.)
Katz, William A. Introduction to Reference Work. 5th. ed. New York: McGraw-Hill, 1987.
Cita MLA (9a ed.)
Katz, William A. Introduction to Reference Work. 5th. ed. McGraw-Hill, 1987.
Precaución: Estas citas no son 100% exactas.