Clifford, P., & Clifford, R. (2007). Self-normalised distance with don't cares.
芝加哥风格引文Clifford, P., 与 R. Clifford. Self-normalised Distance with Don't Cares. 2007.
MLA引文Clifford, P., 与 R. Clifford. Self-normalised Distance with Don't Cares. 2007.
警告：这些引文格式不一定是100％准确.