Clairmonte, Frederick, author
Zed Press, 1983
Buku Teks
Fitzgerald, Robert, 1959-, author
Cambridge University Press, 2015
Buku Teks
Forrester, Jay W. (Jay Wright), author
Wright-Allen Press, 1973
Buku Teks
Thomlinson, Ralph
Random House, 1965
Buku Teks
Thomlinson, Ralph
California State University, 1976
Buku Teks