Pustay, John S.
The Free Press, 1965
Buku Teks
Nasution, Abdul Haris, 1918-2000, author
Seruling Masa , 1970
Buku Teks
Dinniss, Heather Harrison, author
Cambridge University Press, 2012
Buku Teks
Dinniss, Heather Harrison
Cambridge Univ. Press, 2014
Buku Teks
Warren, Peter, author
Hodder & Stoughton Ltd., 2013
Buku Teks