APA

Library of Congress, . (1977). International copyright conventions. Washington: Library of Congress, Copyright Office.

Chicago

Library of Congress, . 1977. International copyright conventions. Washington: Library of Congress, Copyright Office.

Harvard

Library of Congress, . (1977). International copyright conventions. Washington: Library of Congress, Copyright Office.

MLA

Library of Congress, . International copyright conventions. Washington: Library of Congress, Copyright Office. 1977.