Maxwell, Gavin
Harper & Brothers, 1957
Buku Teks
Gavin, Traude, author
KITLV Press, 2003
Buku Teks
McKernan, Michael, author
Nelson, 1984
Buku Teks
Steiner, Hugo, author
Opus Publication, 2007
Buku Referensi
Taut, Bruno
Sanseido Co. Ltd, 1958
Buku Teks