Crawford, F. Robert, author
Prentice-Hall, 1973
Buku Teks
Vazsonyi, Andrew, author
Richard D. Irwin, 1980
Buku Teks
Potter, George B., author
Business, 1984
Buku Teks
Harris, Martin L., author
Wiley, 1973
Buku Teks
Orilla, Lawrence S., author
McGraw-Hill Int.Book, 1983
Buku Teks