APA

Library of Congress, . (1990). LC period subdivisions under names of places: compiled from the online subject authority file. Washington, D.C: Cataloging Distribution Service, Library of Congress.

Chicago

Library of Congress, . 1990. LC period subdivisions under names of places: compiled from the online subject authority file. Washington, D.C: Cataloging Distribution Service, Library of Congress.

Harvard

Library of Congress, . (1990). LC period subdivisions under names of places: compiled from the online subject authority file. Washington, D.C: Cataloging Distribution Service, Library of Congress.

MLA

Library of Congress, . LC period subdivisions under names of places: compiled from the online subject authority file. Washington, D.C: Cataloging Distribution Service, Library of Congress. 1990.