APA-referens (7:e uppl.)

Library of Congress. Copyright Office. U.S. Copyright Renewals, 1970 January - June.

Chicago-referens (17:e uppl.)

Library of Congress. Copyright Office. U.S. Copyright Renewals, 1970 January - June.

MLA-referens (9:e uppl.)

Library of Congress. Copyright Office. U.S. Copyright Renewals, 1970 January - June.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.