Knowles, Ronald, author
Macmillan, 1988
Buku Teks
edited by Arthur Ganz ... [and others]
Prentice-Hall, 1972
Buku Teks
Dukore, Bernard F. (Bernard Frank), 1931-
Macmillan Education , 1988
Buku Teks
Leila Djafaar, author
1985
UI - Skripsi (Membership)
Tydeman, William
Macmillan Education, 1988
Buku Teks