Darmon, Rene Y.
McGraw-Hill , 1991
Buku Teks
Modern Belgium Association , 1990
Buku Teks
Meredith, Jack R., author
Wiley, 2015
Buku Teks
Sturdivant, Frederick D., author
Richard D. Irwin, 1977
Buku Teks
Lerner, Eugene M., author
Harcourt Brace Jovanovich , 1971
Buku Teks