edited by Charles W. Kegley and Eugene R. Wittkopf
McGraw-Hill, 1992
Buku Teks
edited by Charles W. Kegley and Eugene R. Wittkopf
Random House, 1984
Buku Teks
Weihrich, Heinz, author
McGraw-Hill, 1993
Buku Teks
Ferrante, Joan
California Wadsworth Publishing , 1992
Buku Teks
Johnson, Hazel J., author
McGraw-Hill, 1993
Buku Teks