Breazeale, Dan (2001-08-30). "Johann Gottlieb Fichte" (به انگلیسی). Metaphysics Research Lab, Stanford University. {{cite journal}}: Cite journal requires |journal= (help)
utm.edu
Alan Pratt defines existential nihilism as "the notion that life has no intrinsic meaning or value, and it is, no doubt, the most commonly used and understood sense of the word today" Internet Encyclopedia of Philosophyبایگانیشده در ۱۲ آوریل ۲۰۱۰ توسط Wayback Machine
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Alan Pratt defines existential nihilism as "the notion that life has no intrinsic meaning or value, and it is, no doubt, the most commonly used and understood sense of the word today" Internet Encyclopedia of Philosophyبایگانیشده در ۱۲ آوریل ۲۰۱۰ توسط Wayback Machine
wikisource.org
fa.wikisource.org
One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Jacobi, Friedrich Heinrich". Encyclopædia Britannica (به انگلیسی). Vol. 15 (11th ed.). Cambridge University Press. pp. 115–116.