Gaya APA
Katz, William A.. (1987).
Introduction to reference work volume II reference services and reference processes (5th ed.).
New York:
McGraw-Hill.
Gaya Chicago
Katz, William A..
Introduction to reference work volume II reference services and reference processes.
5th ed.
New York:
McGraw-Hill,
1987.
Text.
Gaya MLA
Katz, William A..
Introduction to reference work volume II reference services and reference processes.
5th ed.
New York:
McGraw-Hill,
1987.
Text.
Gaya Turabian
Katz, William A..
Introduction to reference work volume II reference services and reference processes.
5th ed.
New York:
McGraw-Hill,
1987.
Print.