Matthews, Carole, author
Gramedia Pustaka Utama, 2005
Buku Teks
Jakarta Pustaka Jaya 1952
UI - Makalah dan Kertas Kerja
Bayu Kristianto, author
2000
UI - Skripsi (Membership)
Canot, Robert
New York Bantam Books c 1967
Buku Teks
Stafford, J.
New York Harcourt, Brace and Company 1944
Buku Teks