compiled and edited by Bill Wannan
Macmillan, 1974
Buku Referensi
Williams, Kenneth
Billing & Sons Ltd , 1980
Buku Teks
Sari Endahwarni
1990
UI - Tesis (Membership)
Skinner, Cornelia Otis
Dodd, Mead, 1955
Buku Teks
Alexander APR
1995
UI - Skripsi (Membership)