Classification. Class P, subclasses PJ-PM:
languages and literatures of Asia, Africa, Oceania, America, mixed languages, artificial languages,
with supplementary pages.

APA Citation

Library of Congress. Classification Division. (1956). Classification. Class P, subclasses PJ-PM: languages and literatures of Asia, Africa, Oceania, America, mixed languages, artificial languages. Washington.

MLA Citation

Library of Congress. Classification Division. Classification. Class P, Subclasses PJ-PM: Languages And Literatures of Asia, Africa, Oceania, America, Mixed Languages, Artificial Languages. Washington, 1956.

Warning: These citations may not always be complete (especially for serials).