Shenkel, William M., author
McGraw-Hill, 1980
Buku Teks
Shenkel, William M., author
Business Publications , 1980
Buku Teks
Fisher, Ernest McKinley, author
Macmillan, 1923
Buku Teks
Universitas Indonesia, 2007
UI - Skripsi (Membership)
Thauriq Anwar, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2014
UI - Tesis (Membership)