Classification.
Class P, subclasses PB-PH: modern European languages (with supplementary pages)
APA Citation
Library of Congress. Subject Cataloging Division., Library of Congress. Classification Division., Gale Research Company. (19631966). Classification. Washington.
MLA Citation
Library of Congress. Subject Cataloging Division, Library of Congress. Classification Division, and Gale Research Company. Classification. Washington, 19631966.
Warning: These citations may not always be complete (especially for serials).