Williams. Proof. University of North Texas Press.
芝加哥风格引文Williams. Proof. University of North Texas Press.
MLA引文Williams. Proof. University of North Texas Press.
警告：这些引文格式不一定是100％准确.
APA引文
Williams. Proof. University of North Texas Press.
芝加哥风格引文Williams. Proof. University of North Texas Press.
MLA引文Williams. Proof. University of North Texas Press.