Rougier, Harry
W.W. Norton & Co., 1970
Buku Teks
Weisman, Herman M.
Charles E. Merrill Publishing Company, 1980
Buku Teks
Sklare, Arnold B.
McGraw-Hill, 1964
Buku Teks
Waldo, Willis H.
Reinhold Pub,Co., 1960
Koleksi Publik
Modern Business reports, 1987
Buku Teks