Herbert, Theodore T., author
Macmillan, 1976
Buku Teks
Knudson, Harry R.
SAddison-Wesley Pub. Co., 1967
Buku Teks
Jones, Gareth R., author
South-Western Cengage Learning, 2013
Buku Teks
Phillips, Robert, 1968-, author
Berrett-Koehler, 2003
Buku Teks
Shafritz, Jay M., author
Wadsworth, 2016
Buku Teks