Stark, Werner, author
Routledge & Kegan Paul, 1948
Buku Teks
Bade, Robin, author
Pearson, 2013
Buku Teks
Peters, Michael A., author
Sense, 2012
eBooks
Pigou, A.C. (Arthur Cecil), 1877-1959, author
Macmillan, 1952
Buku Teks
Khan, M. Fahim,author
The Islamic Foundation , 1995
Buku Teks