Bunyan, John, author
Jocket Library, 1957
Koleksi Publik
Bunyan, John, author
Zephyr Books, 1945
Buku Teks
Behrman, Daniel, author
UNESCO, 1964
Buku Teks
Setyo Anggraini, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2011
UI - Tesis (Open)
Armstrong, James W., author
Macmillan, 1976
Buku Teks