Sowell, T. (2007). A man of letters. Encounter Books.
芝加哥风格引文Sowell, Thomas. A Man of Letters. New York: Encounter Books, 2007.
MLA引文Sowell, Thomas. A Man of Letters. Encounter Books, 2007.
警告：这些引文格式不一定是100％准确.
APA引文
Sowell, T. (2007). A man of letters. Encounter Books.
芝加哥风格引文Sowell, Thomas. A Man of Letters. New York: Encounter Books, 2007.
MLA引文Sowell, Thomas. A Man of Letters. Encounter Books, 2007.