Brown, Catherine L.
Petheric Press, 1975
Buku Teks
edited by William A. Dunson
University Park Press, 1975
Buku Teks
Tanaka, Yoshifumi, author
Cambridge University Press, 2012
Buku Teks
Devaux, Bernard
Barron's Educational Series, 2000
Buku Referensi
Bowett, D.W. (Derek William), author
Manchester University Press, 1967
Buku Teks