Chen, Percy
Little, Brown, 1979
Buku Teks SO
Oshana, Maryann
Garland Publishing, 1985
Buku Referensi
edited by Catherine Itzin
Oxford University Press, 1992
Buku Teks
Chung, Han-sook
Dong-suh-Munhak-sa, 1990
Buku Teks SO
Kingston, Beverly
Thomas Nelson Australia Pty Limited, 1979
Buku Teks SO