Louise Edwards, Mina Roces, editor
Allen & Unwin , 2000
Buku Teks SO
Prentice-Hall, 1993
Buku Teks
edited by Chung Sei-wha; transled by Shin Chang-hyun ... [and others]
Ewha Womens University Press, 1986
Buku Teks SO
Lips, Hilary M.
McGraw-Hill, 2003
Buku Teks SO
Grewal, Inderpal
McGraw-Hill, 2002
Buku Teks SO