Cunningham, Lawrence
BlackWell, 2004
Buku Teks SO
Duchet-Suchaux, Gaston
Flammarion, 1994
Buku Referensi
Cecil, Lord David
Clarendom Press, 1951
Buku Teks SO
Knowles, David
At University Press, 1963
Buku Teks SO
editor, Eddy E. Saerang; penerjemah, Wilson Nadeak
Indonesia Publishing House , 1996
Buku Teks SO