Lorsch, Jay W.
Homewood, IL. Richard D. Irwin 1972,
Buku Teks
Lawrence, Paul R.
Addison-Wesley, 1969
Buku Teks
Lawrence, Paul R.
Dorsey Press, 1961
Buku Teks
Richard D. Irwin. Inc, 1975
Buku Teks
Glover, John D.
Harvard University, Division of Research, Graduate School of Business Administration, 1960
Buku Teks