Wittgenstein, L., Klagge, J. C., & Nordmann, A. (1993). Philosophical occasions, 1912-1951. Hacket.
芝加哥风格引文Wittgenstein, Ludwig, James Carl Klagge, 与 Alfred Nordmann. Philosophical Occasions, 1912-1951. Indianapolis: Hacket, 1993.
MLA引文Wittgenstein, Ludwig, et al. Philosophical Occasions, 1912-1951. Hacket, 1993.
警告：这些引文格式不一定是100％准确.