Lewis, P. M., & Coates, C. L. (1967). Threshold logic. Wiley.
芝加哥风格引文Lewis, Philip M., 与 Clarence Leroy Coates. Threshold Logic. New York: Wiley, 1967.
MLA引文Lewis, Philip M., 与 Clarence Leroy Coates. Threshold Logic. Wiley, 1967.
警告：这些引文格式不一定是100％准确.