Clark, M. M. (1990). The tonal system of Igbo. Foris.
芝加哥风格引文Clark, Mary Morris. The Tonal System of Igbo. Dordrecht ; Providence, RI: Foris, 1990.
MLA引文Clark, Mary Morris. The Tonal System of Igbo. Foris, 1990.
警告：这些引文格式不一定是100％准确.
APA引文