Jakarta Direktorat Pemasaran PFN 1995,
Buku Teks
Anderson, Joseph L.
Rutland Charles E Tuttle 1959
Buku Teks
edited by Peter Cowie
Hamlyn, 1995
Buku Referensi
J.B. Kristanto
Kompas, 2004
Buku Teks
Boggs, Joseph M.
Mountain View, Ca. Mayfield Publishing 1995,
Buku Teks