Παραπομπή σε μορφή APA (7η εκδ.)

Estados Unidos. Library of Congress. (1959). Classification: History class D, general and old world (2a. ed.). Library of Congress.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Estados Unidos. Library of Congress. Classification: History Class D, General and Old World. 2a. ed. Washington: Library of Congress, 1959.

Παραπομπή σε μορφή MLA (9th εκδ.)

Estados Unidos. Library of Congress. Classification: History Class D, General and Old World. 2a. ed. Library of Congress, 1959.