Sargent, Lyman Tower
Wadsworth , 2009
Buku Teks SO
Sargent, Lyman Tower
The Dorsey Press, 1981
Buku Teks SO
Jurusan Sejarah FS-UI , 1996
Buku Teks
Stark, W.
Kegan Paul, Trenck, Trubner & Co., 1947
Buku Teks SO
Fowler, Robert Booth
Praeger, 1985
Buku Teks SO