Barker, S. F.
Cornell University Press, 1957
Buku Teks
Tarski, Alfred
Oxford University Press, 1959
Buku Teks
Lowe, E. J. (E. Jonathan), author
Wiley-Blackwell, 2009
Buku Teks
Grayling, A. C.
Blackwell Publishers, 1997
Buku Teks
Prior, Arthur N.
At The Clarendon Press, 1956
Buku Teks