Gilmer, B. von Haller (Beverly von Haller), 1909-1994, author
McGraw-Hill, 1966
Buku Teks
McCormick, Ernest J. (Ernest James), author
Prentice-Hall, 1980
Buku Teks
Cascio, Wayne F., author
Reston Pub. Co, 1982
Buku Teks
Munsterberg, Hugo, 1916-1995, author
Floating Press, 2009
Buku Teks
Miner, John B., author
McGraw-Hill, 1992
Buku Teks