Cita APA (7th ed.)

Katz, W. A. (1978). Introduction to reference work (3rd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Katz, William Armstrong. Introduction to Reference Work. 3rd ed. New York: McGraw-Hill, 1978.

Cita MLA (9th ed.)

Katz, William Armstrong. Introduction to Reference Work. 3rd ed. McGraw-Hill, 1978.