Seminar Press, 1973
Buku Teks
Jones, Andrew
Cambridge University Press, 2002
Buku Teks SO
Lathrap, Donald W.
[T.t.] [T.p.] 1955
Buku Teks
edited by Linda Ellis
Garland Publishing, 1999
Buku Referensi
Johnson, Matthew
Wiley-Blackwell, 2010
Buku Teks SO