Klemm, Friedrich, author
George Allen and Unwind, 1959
Buku Teks
Jordan, R. Furneaux, author
Thames, [Date of publication not identified]
Buku Teks
Cohen, J.M. (John Michael), 1903-1989, author
Penguin Books, 1956
Buku Teks
Jo, Hyun-sol, author
Munhak waji sengso, 2003
Buku Referensi
Broeze, Frank J.A., author
[Publisher not identified], 1974
Buku Teks