Lusk, Edward J., author
Aspen Systems, 1979
Buku Teks
Young, David W., author
Aspen, 1984
Buku Teks
Slavin, Albert, author
Holt Rinehart and Winston, 1972
Buku Teks
Levey, Samuel, author
J.B. Lippincott, 1973
Buku Teks
Levey, Samuel, author
J.B. Lippincott, 1984
Buku Teks