Kempson, Ruth M.
Blackwell , 2001
Buku Teks
Shepherd, D. G. (Dennis G.)
Macmillan, 1956
Buku Teks
Peng, William W.
Wiley, 2008
Buku Teks
edited by Earl Logan, Jr.
Marcel Dekker, Inc., 1994
Buku Referensi
edited by Earl Logan, Jr., Ramendra Roy
Marcel Dekker, 2003
Buku Referensi