Miller, Robert H., author
McGraw-Hill, 1994
Buku Teks
Nolthenius, Helene, author
Querido, 1991
Buku Teks
Iowa State University Press , 1964
Buku Teks
Prichard, James W.
John Wiley & Sons, 1965
Buku Teks
Belote, James H.
Harper & Row Publishers, 1967
Buku Teks