King, W. (2006). The essence of liberty: Free black women during the slave era. University of Missouri Press.
芝加哥风格引文King, Wilma. The Essence of Liberty: Free Black Women During the Slave Era. Columbia: University of Missouri Press, 2006.
MLA引文King, Wilma. The Essence of Liberty: Free Black Women During the Slave Era. University of Missouri Press, 2006.
警告：这些引文格式不一定是100％准确.