edited by Wang Gungwu, Milagros Guerrero & David G. Marr
Australian National University, 1981
Buku Teks SO
Hacker, Diana
Bedford Books of St. Martin`s Press, 1995
Buku Teks SO
Lewis, Wyndham
Greenwood Press, 1952
Buku Teks SO
edited by Barry Turner
Macmillan and Free Press, 1992
Buku Referensi
edited by Barry Turner
Macmillan, 1992
Buku Referensi