An Ongoing voyage, 1492-1992 :
the Library of Congress quincentenary exhibition.

APA Citation

Library of Congress. (1992). An Ongoing voyage, 1492-1992: the Library of Congress quincentenary exhibition. [Washington, D.C.?]: The Library.

MLA Citation

Library of Congress. An Ongoing Voyage, 1492-1992: the Library of Congress Quincentenary Exhibition. [Washington, D.C.?]: The Library, 1992.

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