Gabriel, Peter P.
Harvard University, Division of Research, Graduate School of Business Administration, 1967
Buku Teks
edited by Nick Eberstadt
Frederick A. Praeger, 1981
Buku Teks
Johnson, Harry G.
Praeger , 1968
Buku Teks
Kirkpatrick, Colin H.
George Allen and Unwin, 1984
Buku Teks
Heller, Jack
Law School of Harvard University, 1963
Buku Teks