Friedman, Milton, 1912-2006, author
Harcourt Brace Jovanovich, 1984
Buku Teks
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1971
UI - Skripsi (Membership)
Bullock, Alan, author
Harper and Row, 1962
Buku Teks
Chase, Stuart, author
Harcourt, Brace, 1938
Buku Teks
Burch, John G., author
John Wiley & Sons, [date of publication not identified]
Buku Teks