Palgrave, Francis Turner
Walter J. Black Inc, 1932
Buku Teks
Spenser, Edmund
J.M Dent & Sons, 1956
Buku Teks
Dransfield, Michael
University of Queensland Press, 1978
Buku Teks
Longmans, 1961
Buku Teks
Reeves, James, author
William Heinemann , 1961
Buku Teks