1.
Ludwig Wittgenstein. London: Jonathan Cape; 1990.
Ludwig Wittgenstein. London : Jonathan Cape, 5 mai 1990. ISBN 0-224-02712-3
Monk Ray. (1990). Ludwig Wittgenstein: The duty of genius. Jonathan Cape.
MLA (8th ed.) CitationMonk Ray. Ludwig Wittgenstein: The Duty of Genius. Jonathan Cape, 1990.
Warning: These citations may not always be 100% accurate.