Tarulis, Albert N.
University of Notre Dame Press, 1959
Buku Teks
edited by Robbin F. Laird and Erik P. Hoffman
Aldine de Gruyter, 1986
Buku Teks
Foreign Languages Publishing House, 1962
Buku Teks
Progress Publisher, 1981
Buku Teks
Hinton, Harold C., author
National Strategy Information Center, 1976
Buku Teks