Boyle, Thomas A., author
Brooks/Cole, 1985
Buku Teks
Metcalf, Michael, author
Clarendon Press , 1985
Buku Teks
Page, Clive, author
Multi Media, 1985
Buku Referensi
Seeds, Harice L., author
John Wiley & Sons, 1981
Buku Teks
Hammond, Robert H., author
Erlangga, 1987
Buku Teks