Mooney, James D., author
Harper & Row , 1974
Buku Teks
Waldman, Don E., author
Pearson, 2007
Buku Teks
Koch, James V., author
Prentice-Hall, 1980
Buku Teks
Shepherd, William G., author
Prentice-Hall, 1979
Buku Teks
Brown, Alvin
Prentice-Hall, 1947
Buku Teks