Brewer, Richard, author
Saunders College Publishing, 1982
Buku Teks
London : Pancy Lund Humpries
Majalah, Jurnal, Buletin
Jakarta Pusat Pendidikan dan Latihan Pegawai Depdikbud 1985,
Buku Referensi
Sturgen, Bogdan
"Jona VEB: Gustav Fischer Verlag ,1972",
Buku Teks
Michael, P., author
UI-Press, 1994
Buku Teks