Crabbe, Ernest H.
South-Western Publishing, 1951
Buku Teks
Duttn, Henry P.
McGraw-Hill, 1931
Buku Teks
Shakira Alatas
Fakultas Eknonomi dan Bisnis Universitas Indonesia, 2010
UI - Tesis Open
Arya, Jagdish C.
Prentice-Hall, 1981
Buku Teks
Eiteman, David K.
Pearson, 2010
Buku Teks