APA استشهاد

Monk, R. (1990). Ludwig Wittgenstein: The duty of genius (1st American ed.). Vintage.

استشهاد بنمط شيكاغو

Monk, Ray. Ludwig Wittgenstein: The Duty of Genius. 1st American ed. New York: Vintage, 1990.

MLA استشهاد

Monk, Ray. Ludwig Wittgenstein: The Duty of Genius. 1st American ed. Vintage, 1990.