Barradas, Gerald
Pageant Press , 1956
Buku Teks
Friedman, Milton, 1912-2006, author
The University of Chicago Press, 1962
Buku Teks
Iversen, Torben, author
Cambridge University Press, 2006
Buku Teks
Buku Teks
Redwood, John, author
Pustaka Utama Grafiti, 1990
Buku Teks