edited by Maggie Toy
Academy Group, 1996
Buku Teks SO
Knapp, Stephen
Rockport Publishers, 1998
Buku Teks SO
by Agoes Arismunandar ... [and others]; editor, Gunawan Tjahjono
Archipelago, 1998
Buku Teks SO
Daab,
Buku Referensi
Salvadori, Mario
Prentice-Hall, 1963
Buku Teks SO