Sheriff, A. (1990). Slaves, spices and ivory in Zanzibar. Tanzania publ..
芝加哥风格引文Sheriff, Abdul. Slaves, Spices and Ivory in Zanzibar. Tanzania: Tanzania publ., 1990.
MLA引文Sheriff, Abdul. Slaves, Spices and Ivory in Zanzibar. Tanzania publ., 1990.
警告：这些引文格式不一定是100％准确.