Gaya APA
Katz, William A.. (1992).
Introduction to reference work Volume II Reference services and reference processes .
New York:
Mc Graw Hill.
Gaya Chicago
Katz, William A..
Introduction to reference work Volume II Reference services and reference processes.
New York:
Mc Graw Hill,
1992.
.
Gaya MLA
Katz, William A..
Introduction to reference work Volume II Reference services and reference processes.
New York:
Mc Graw Hill,
1992.
.
Gaya Turabian
Katz, William A..
Introduction to reference work Volume II Reference services and reference processes.
New York:
Mc Graw Hill,
1992.
.