APA (7th ed.) Zitazioa

Siebert, W. H. The Underground Railroad from Slavery to Freedom: A comprehensive history.

Chicago Style (17th ed.) Zitazioa

Siebert, Wilbur Henry. The Underground Railroad from Slavery to Freedom: A Comprehensive History.

MLA (9th ed.) Zitazioa

Siebert, Wilbur Henry. The Underground Railroad from Slavery to Freedom: A Comprehensive History.

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