edited by Downe Soo
Churchill Livingstone , 2008
Buku Teks
Universitas Indonesia, 2010
UI - Skripsi (Open)
Fedrizzi, Mariann, author
South Western Cengage Learning, 2011
Buku Teks
Fryar, Maridell
National Textbook Co., 1979
Buku Teks
Ratri Candra Restuti, author
Universitas Indonesia, 2008
UI - Skripsi (Open)