Alexander, Christopher, author
Oxford University Press, 1977
Buku Referensi
Oxford University Press, 1977
Buku Teks
Liebing, Ralph W., author
John Wiley & Sons, 1982
Buku Teks
Hopkinson, R.G.
Faber and Faber, 1972
Buku Teks
Grow, Thomas A.
Prentice-Hall, 1975
Buku Teks