Kingdon, Frank, author
Arco Publishing, 1944
Buku Teks
Leuchtenburg, William E., author
Pustaka Sinar Harapan , 1994
Buku Teks
Lorant, Stepan
N.Y,Simon and Schuster, 1950
Buku Teks
Mizan, 1998
Buku Teks
Douglas, Helen Gahagan, author
Hill and Wang, 1963
Buku Teks