Gaya APA

Wittgenstein, L. (1972). On certainty. Ed. by G.E.M. Anscombe & G.H. von Wright, transl. by Denis Paul & G.E.M. Anscombe. : Über Gewissheit. 1972 . New York dll: New York dll Harper Torchbooks.

Gaya MLA

Wittgenstein, Ludwig. "On certainty. Ed. by G.E.M. Anscombe & G.H. von Wright, transl. by Denis Paul & G.E.M. Anscombe. : Über Gewissheit. 1972". New York dll: New York dll Harper Torchbooks, 1972. Buku.