Appleby, Doris, author
McGraw-Hill, 1991
Buku Teks
Barnes, J. G. P. (John Gilbert Presslie), author
Addison-Wesley, 1981
Buku Teks
Tucker, Allen B., author
McGraw-Hill, 1977
Buku Teks
Iverson, Kenneth E., author
John Wiley & Sons, 1962
Buku Teks
Barnard, David T., author
Reston Publishing Company, Inc., 1982
Buku Teks