APA

The copyright office of the United States of America : what it is, and what it does. (s. l.): (s. n.).

Chicago

The copyright office of the United States of America : what it is, and what it does. (s. l.): (s. n.).

Harvard

The copyright office of the United States of America : what it is, and what it does. (s. l.): (s. n.).

MLA

(s. l.): (s. n.). .