APA-viite (7. p.)

Alpers, E. A. (1975). Ivory and slaves: Changing pattern of international trade in East Central Africa to the later nineteenth century. University of California Press.

Chicago-viite (17. p.)

Alpers, Edward A. Ivory and Slaves: Changing Pattern of International Trade in East Central Africa to the Later Nineteenth Century. Berkeley: University of California Press, 1975.

MLA-viite (8. p.)

Alpers, Edward A. Ivory and Slaves: Changing Pattern of International Trade in East Central Africa to the Later Nineteenth Century. University of California Press, 1975.