Johnson, Curtis D., 1939-, author
John Wiley & Sons, 1977
Buku Teks
Barney, George C., author
Prentice-Hall, 1985
Buku Teks
Les Kane, editor
Gulf Publishing, 1987
Buku Referensi
Barney, George C., author
Prentice-Hall, , 1988"
Buku Teks
Barney, George C., author
Prentice-Hall, 1988
Buku Teks