Davies, Ruth Ann, author
R. R. Bowker Co, 1969
Buku Teks
Davies, Ruth Ann, author
R. R. Bowker, 1979
Buku Teks
Aikens, C. Harold, author
Pearson/Prentice Hall, 2006
Buku Teks
Longman Singapore Publishers , 1990
Buku Teks
Novani Nugrahani, author
2004
UI - Skripsi (Membership)