Walace, Anthony F.C.
Random House, 1970
Buku Teks
David Matsumoto, editor
Oxford university press, 2001
Buku Teks
Lindholm, Charles
McGraw-Hill, 2001
Buku Teks
Sweets & Zeitlinger, 1989
Buku Teks
Hall, Gordon C. Nagayama
Prentice-Hall, 2002
Buku Teks