Carr, E.H. (Edward Hallet), author
Macmillan, 1946
Buku Teks
Kolarz, Walter
Frederick A.Praeger, 1955
Buku Teks
Best, Harry
Philosophical Library, 1951
Buku Teks
Shitikov, Alexei
Novosty Press Agency Publishing Hause , 1978
Buku Teks
Abdul Manan Aruli, author
2005
Artikel Jurnal