McDonald, A. C.
Reston Publishing Co., 1981
Buku Teks
Phillips, Charles L., author
Prentice-Hall, 1988
Buku Teks
Vande Vegte, J. (John), author
Prentice-Hall, 1986
Buku Teks
Phillips, Charles L., author
Prentice-Hall, 1996
Buku Teks
Hostetter, Gene H., 1939-, author
Saunders College Publishing, 1989
Buku Teks