Davies, Hugh Sykes
Published for the British Council by Longmans, Green, 1960
Buku Teks
Rose, Clifford
Bumi Aksara , 1993
Buku Teks
Rowman & Littlefield Publishers, Inc., 1998
Buku Teks
Routledge, 1988
Buku Teks
Davies, Joseph Edward
Simon and Schuster, 1941
Buku Teks