Njoku, B. C. (1984). The four novels of Chinua Achebe: A critical study. Peter Lang.
芝加哥风格引文Njoku, Benedict Chiaka. The Four Novels of Chinua Achebe: A Critical Study. New York: Peter Lang, 1984.
MLA引文Njoku, Benedict Chiaka. The Four Novels of Chinua Achebe: A Critical Study. Peter Lang, 1984.
警告：这些引文格式不一定是100％准确.