Liptrot, G.F.
The English Language Book Society, 1974
Buku Teks
Huheey, James E., author
Harper & Row Publisher, 1973
Buku Teks
Huheey, James E., author
Harper & Row Publisher, 1972
Buku Teks
Ochiai, Ei-Ichiro, author
Macmillan Press, 1979
Buku Teks
Barnett, E. de Barry, author
Longman, 1957
Buku Teks