Gillespie, Sheena, author
Scott, Foresman and Company, 1986
Buku Teks
Hayward, Susan, author
Routledge , 2006
Buku Referensi
Anthony R. Guneratne, editor; Wimal Dissanayake, editor
Routledge, 2003
Buku Teks
Hayward, Susan, author
Routledge, 2006
Buku Teks
Sato, Tadao, 1930-
Harper & Row, 1987
Buku Teks