Michael J. Gibney, Barrie M. Margaretts, John M. Kearney ; Andry Hartono, translator
EGC, 2008
Buku Teks
Artikel Jurnal
Marsetyo, author
Rineka Cipta, 1991
Buku Teks
Nicholls, Lucius, author
Balai Pustaka , 1976
Buku Teks
Fleck, Henrietta
Macmillan, 1966
Buku Teks