Cita APA

Library of Congress. Subject Cataloging Division. (1964). Classification: Class P, subclasses, PN, PR, PS, PZ. S. Govt. Print. off.].

Citación estilo Chicago

Library of Congress. Subject Cataloging Division. Classification: Class P, Subclasses, PN, PR, PS, PZ. Washington U: S. Govt. Print. off.], 1964.

Cita MLA

Library of Congress. Subject Cataloging Division. Classification: Class P, Subclasses, PN, PR, PS, PZ. S. Govt. Print. off.], 1964.