Lockyer, Keith, author
Prentice-Hall, 1996
Buku Teks
Lockyer, Keith, author
Prentice-Hall, 2005
Buku Teks
Punmia, B.C., author
Laxmi Publications, 1988
Buku Teks
Woodward, J. F., author
Macmillan, 1975
Buku Teks
O`Brien, James J., author
McGraw-Hill, 1971
Buku Teks