APA Style
Immroth's guide to Library of Congress classification. (1980).
:
.
Chicago Style
Immroth's guide to Library of Congress classification.
4th ed..
:
,
1980.
.
MLA Style
Immroth's guide to Library of Congress classification.
4th ed..
:
,
1980.
.
Turabian Style
Immroth's guide to Library of Congress classification.
:
,
1980.
.