Murrell, John N.
John Wiley & Sons, 1980
Buku Teks
Wedgwood, Cicely Veronica, 1910-
British Council by Longmans, Green, 1955
Buku Teks SO
Rutherfurd, Edward
Crwon , 1997
Buku Teks
Magdalia
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1983
UI - Skripsi Membership
Irma Septimi
1986
UI - Skripsi Membership