Ahern, Barnabas M., author
Fides, 1963
Buku Teks
Huchingson, R. Dale, author
McGraw-Hill, 1981
Buku Teks
Chomsky, Noam, author
Cambridge University Press, 2002
eBooks
Barrow, Colin, author
John Wiley & Sons, 2001
Buku Teks
Nicholson, Max, author
Penguin Books, 1970
Buku Teks