Asensio, Paco, editor
Loft, 2002
Buku Referensi
Casamassima, Christy
PBC International, 1998
Buku Teks
Taylor, Andrew
University of Queensland Press, 1971
Buku Teks
McGraw-Hill, 1960
Buku Teks
Murakmi, Kei, editor
Shotenkenchiku-Sha , 2002
Buku Referensi