Rosen, Michael, author
Walker, 2000
Buku Teks
Williams, Kenneth
Billing & Sons Ltd , 1980
Buku Teks
Sari Endahwarni, author
1990
UI - Tesis (Membership)
Skinner, Cornelia Otis, author
Dodd, Mead, 1955
Buku Teks
Alexander APR, author
1995
UI - Skripsi (Membership)