Cita APA (7th ed.)

Katz, W. A. (1992). Introduction to reference work (6th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Katz, William A. Introduction to Reference Work. 6th ed. New York: McGraw-Hill, 1992.

Cita MLA (8th ed.)

Katz, William A. Introduction to Reference Work. 6th ed. McGraw-Hill, 1992.