Salindinah S. Soetarto, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1982
UI - Skripsi (Membership)
Dowling, Barbara Tolley
Newbury House Publishers , 1982
Buku Teks
Hanks, Patrick
Cambridge University Press, 1990
Buku Teks
McKay, Herbert
Oxford University Press, 1946
Buku Teks
McIntosh, Enid
Oxford University Press, 1951
Buku Teks