Aguirre, Adalberto, author
McGraw-Hill, Higher Education, 2009
Buku Teks
Aguirre, Adalberto, author
McGraw-Hill, 2001
Buku Teks
Wittkopf, Eugene R., author
Thomson wadsworth, 2008
Buku Teks
Eugene R. Wittkopf, James M. McCormick, editor
Rowman & Littlefield publisher INC, 2008
Buku Teks
Kissinger, Henry A., author
Weidenfeld & Nicolson, 1969
Buku Teks