Sturmthal, Adolf Fox
Harvard University , 1964
Buku Teks
Ranke, Leopold von, 1795-1886
Roskam, 1944
Buku Teks
Hong, Chung-ok
Chang Jak iwa BT pyeong Sa, 1998
Buku Teks
Becker, Carl L. (Carl Lotus), 1873-1945
Silver Burdett, 1944
Buku Teks
UI-Press, 1988
Buku Referensi