Robinson, Webster
McGraw-Hill, 1925
Buku Teks
Moore, Herbert
McGraw-Hill, 1942
Buku Teks
Coleman, Richard M.
American Management Association, 1995
eBooks
Abruzzi, Adam
Columbia University Press, 1953
Buku Teks
Kimball, Dexter S
McGraw-Hi, 1947
Buku Teks