Winardi, author
Alumni , 1976
Buku Teks
Sinar Baru, 1980
Buku Teks
Hicks, Herbert G., author
McGraw-Hill, 1981
Buku Teks
Seckler-Hudson, Catheryn, author
Washington, D.C., The American University Press
Buku Teks
Dessler, Gary, 1942-, author
Prentice-Hall, 1976
Buku Teks