Walton, Richard E
Addison-Wesley, 1987
Buku Teks
edited by John J. McIntyre
National Defense University Press, 1979
Buku Teks
Collier, John G. (John Greenwood), author
Cambridge University Press, 1994
Buku Teks
Collier, John G. (John Greenwood), author
Cambridge University Press, 1987
Buku Teks
Simmie, James M., author
Hutchinson, 1974
Buku Teks