Luckett, Dudley G., author
McGraw-Hill , 1984
Buku Teks
Pesek, Boris P., author
Harvester. Wheatshaf, 1988
Buku Teks
Silalahi, Pristanto, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2022
UI - Tesis (Membership)
Barger, Harold, author
Rand McNally, 1969
Buku Teks
Whittless, Charles R., author
Macmillan, 1963
Buku Teks