Meyer, Charles H.
West Publishing Co., 1995
Buku Teks
Sherman, Eliot H., author
[American Management Association;, ], 2011
eBooks
Bogen, Jules I.
Alexander Hamilton Institute, 1961
Buku Teks
Osborn, Richards C.
Harper & Brothers, 1959
Buku Teks
Rose, T.G.
Sir Isaac Pitman & Sons, Ltd., 1959
Buku Teks