Jaschke, H.A.
London : Routledge & Kegan Paul Ltd., 1949.
Buku Teks
Jaschke, H. A., author
Trubner and Co. Ludgate Hill, 1882
Buku Referensi
Markus, John, 1911-
McGraw-Hill, 1982
Buku Teks
Tarlekar, G. H., author
Motial Banarsidass Publishers, 1991
Buku Teks
Thirlwall, Anthony Philip, author
English Language Book Society, 1978
Buku Teks