Bus, H. Trading slavery and liberation in the Americas: The Spanish-American connection in the works of Olaudah Equiano, Herman Melville, Martin R. Delany and Sutton E. Griggs / Heiner Bus. Black liberation in the Americas.(2001).
Lua i Stíl Chicago (17ú heag.)Bus, Heiner. "Trading Slavery and Liberation in the Americas: The Spanish-American Connection in the Works of Olaudah Equiano, Herman Melville, Martin R. Delany and Sutton E. Griggs / Heiner Bus." Black Liberation in the Americas.(2001) .
Lua MLA (8ú heag.)Bus, Heiner. "Trading Slavery and Liberation in the Americas: The Spanish-American Connection in the Works of Olaudah Equiano, Herman Melville, Martin R. Delany and Sutton E. Griggs / Heiner Bus." Black Liberation in the Americas.(2001), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.