Gaya APA
Smith, Linda C., Bopp, Richard E.. (2011).
Reference and information service : an introduction (4th ed).
California:
Libraries Unlimited.
Gaya Chicago
Smith, Linda C., Bopp, Richard E..
Reference and information service : an introduction.
4th ed
California:
Libraries Unlimited,
2011.
Text.
Gaya MLA
Smith, Linda C., Bopp, Richard E..
Reference and information service : an introduction.
4th ed
California:
Libraries Unlimited,
2011.
Text.
Gaya Turabian
Smith, Linda C., Bopp, Richard E..
Reference and information service : an introduction.
4th ed
California:
Libraries Unlimited,
2011.
Print.