Aesop
Grolier Enterprises Corp., 1995
Buku Referensi
Hall, Gordon C. Nagayama
Prentice-Hall, 2002
Buku Teks
Heine, Steven J.
Norton, 2016
Buku Teks
John W. Berry...[et al.].
Cambridge University Press, 2002
Buku Teks
by John W. Berry ... [and others]
Cambridge University Press, 1992
Buku Teks