Tinker, Miles A.
Appleton-Century-Crofts, 1962
Buku Teks
Patricia M. Cunningham ... [et al]
Longman, 1983
Buku Teks
Tan Siu Jun
1992
UI - Skripsi (Membership)
R. A. Widyarini Utami
1996
UI - Skripsi (Membership)
Silalahi, Corina Debora, supervisor
1992
UI - Skripsi (Membership)