Estados Unidos. Library of Congress. (1959). Classification: History class D, general and old world (2a. ed.). Library of Congress.
Chicago-referens (17:e uppl.)Estados Unidos. Library of Congress. Classification: History Class D, General and Old World. 2a. ed. Washington: Library of Congress, 1959.
MLA-referens (9:e uppl.)Estados Unidos. Library of Congress. Classification: History Class D, General and Old World. 2a. ed. Library of Congress, 1959.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.