Estados Unidos. Library of Congress. (1959). Classification: History class D, general and old world (2a. ed.). Library of Congress.
Citace podle Chicago (17th ed.)Estados Unidos. Library of Congress. Classification: History Class D, General and Old World. 2a. ed. Washington: Library of Congress, 1959.
Citace podle MLA (9th ed.)Estados Unidos. Library of Congress. Classification: History Class D, General and Old World. 2a. ed. Library of Congress, 1959.
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