Ellis, Keith
Pustaka Sinar Harapan , 1988
Buku Teks
Noviani Adeleyna, author
2008
UI - Skripsi (Open)
Moynihan, Noel, author
Editiones Roche, 1988
Buku Teks
Albert, Katherine A.
Simon & Schuster , 1996
Buku Teks
Andre, author
2016
UI - Tesis (Membership)