Vidya Mara
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1981
UI - Skripsi Membership
Graham, Gaelle
Kesaint Blanc, 2011
Buku Teks
Bladon, Rachel
Passport Books, [Date of publication not identified]
Buku Teks
Skaife, Linda
National Textbook Company, 1994
Buku Teks
Honnor, Sylvia
Arnold-Wheaton, 1986
Buku Teks