Moorad, George
E.P. Duttom, 1949
Buku Teks
Millar, T.B.
Australian Nationsl University Press, 1978
Buku Teks
by J. Swiericzuk ... [and others]
Pitman, 1980
Buku Teks
Orient Longman, 2005
Buku Teks
Roskin, Michael G.
Pearson/Prentice Hall, 2004
Buku Teks