Fogel, R. W. (1994). The quest for the moral problem of slavery: An historiographic odyssey. Gettysburg College.
Citazione stile Chigago Style (17a edizione)Fogel, Robert W. The Quest for the Moral Problem of Slavery: An Historiographic Odyssey. Gettysburg: Gettysburg College, 1994.
Citatione MLA (9a ed.)Fogel, Robert W. The Quest for the Moral Problem of Slavery: An Historiographic Odyssey. Gettysburg College, 1994.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.