Compton, Charles
Inside chemistry
McGarw-Hill, 1979
 Buku Teks
Downs, Anthony
Inside Bureaucracy
Little, Brown and Co., 1967
 Buku Teks
Gunther, John, 1901-1970
Inside Asia
Harper & Brothers, 1942
 Buku Teks
Gunther, John, 1901-1970
Inside Africa
Hamish Hamilon, 1955
 Buku Teks
Gunther, John, 1901-1970
Inside asia
Hamish Hamilton, 1939
 Buku Referensi