by George A. Bermann ... [et al.]
West Pub. Co., 1993
Buku Teks
Tillotson BA., John
Cavendish Publishing Limited, 1996
Buku Teks
Burrows, F.
Clarendon Press , 1987
Buku Teks
Johannes, Hartmut, author
A.W. Sijthoff, 1976
Buku Teks
Toth, A. G., author
Clarendon Press, 1990
Buku Referensi