APA (7 ম সংস্করণ) উদ্ধৃতি

Wittgenstein, L. (1958). Preliminary studies for the "philosophical investigations": The blue and brown books. Harper.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Wittgenstein, Ludwig. Preliminary Studies for the "Philosophical Investigations": The Blue and Brown Books. New York: Harper, 1958.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Wittgenstein, Ludwig. Preliminary Studies for the "Philosophical Investigations": The Blue and Brown Books. Harper, 1958.