Wittgenstein, L. (1969). Preliminary studies for the "Philosophical Investigations", generally known as The Blue and Brown Books / by Ludwig Wittgenstein (2nd ed.). Basil Blackwell.
Chicago Style (17th ed.) CitationWittgenstein, Ludwig. Preliminary Studies for the "Philosophical Investigations", Generally Known as The Blue and Brown Books / by Ludwig Wittgenstein. 2nd ed. Oxford: Basil Blackwell, 1969.
MLA (9th ed.) CitationWittgenstein, Ludwig. Preliminary Studies for the "Philosophical Investigations", Generally Known as The Blue and Brown Books / by Ludwig Wittgenstein. 2nd ed. Basil Blackwell, 1969.
Warning: These citations may not always be 100% accurate.