Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.